/* ==========================================================================
   OpenAI Inspired Design System (Premium Light & Dark Dual Theme)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

:root {
    /* DEFAULT LIGHT MODE (Inspired by OpenAI Main Page) */
    --bg-primary: #f9f9fb;
    --bg-secondary: rgba(249, 249, 251, 0.35); /* Translucent glassmorphism match */
    --bg-tertiary: rgba(240, 240, 244, 0.5);
    --text-primary: #0d0d0e;
    --text-secondary: #56565c;
    --text-muted: #8e8e93;
    
    --accent: #2997ff;
    --accent-glow: rgba(41, 151, 255, 0.06);
    --accent-indigo: #8338ec;
    --accent-purple: #a259ff;
    --accent-gradient: linear-gradient(135deg, #2997ff 0%, #a259ff 100%);
    --mesh-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 99%, #fecfef 100%);
    
    --border: rgba(0, 0, 0, 0.05);
    --border-hover: rgba(0, 0, 0, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 26px;
    
    --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-code: 'Fira Code', monospace;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.02);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.06);
}

/* DARK MODE OVERRIDES */
[data-theme="dark"] {
    --bg-primary: #0b0b0f;
    --bg-secondary: rgba(11, 11, 15, 0.35); /* Translucent glassmorphism match */
    --bg-tertiary: rgba(22, 22, 31, 0.5);
    --text-primary: #f5f5f7;
    --text-secondary: #9a9ab0;
    --text-muted: #565666;
    
    --accent-glow: rgba(41, 151, 255, 0.12);
    --border: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(255, 255, 255, 0.1);
    
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.3);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border-hover) transparent;
}

/* Global focus outlines override to prevent rendering borders/ugly edges */
a:focus, button:focus, svg:focus, div:focus, select:focus, textarea:focus, input:focus {
    outline: none !important;
    box-shadow: none !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: 3px;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    border: none !important; /* Prevent any body boundaries */
}

/* Cohesive SVG styling */
.svg-icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: -0.15em;
    transition: var(--transition-fast);
}

.icon-heart {
    stroke-width: 2;
    fill: none;
}

.icon-lightning {
    fill: currentColor;
    stroke: none;
}

.icon-arrow {
    width: 0.9em;
    height: 0.9em;
    vertical-align: -0.1em;
}

/* ==========================================================================
   Background Ambient Gradients & Noise
   ========================================================================== */
.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -2;
    overflow: hidden;
    pointer-events: none;
    border: none !important;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.08;
    pointer-events: none;
    transition: transform 1.5s ease-out, opacity 0.5s ease;
    border: none !important;
}

[data-theme="dark"] .glow-orb {
    opacity: 0.15;
}

.orb-1 {
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent) 0%, rgba(0,0,0,0) 70%);
}

.orb-2 {
    bottom: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-indigo) 0%, rgba(0,0,0,0) 70%);
}

.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.015'/%3E%3C/svg%3E");
    z-index: -1;
    pointer-events: none;
    border: none !important;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* ==========================================================================
   Page Transition Overlay
   ========================================================================== */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease-in-out;
    border: none !important;
    outline: none !important;
}

.page-transition.active {
    opacity: 1;
    pointer-events: auto;
}

/* ==========================================================================
   OpenAI Inspired Header & Megamenu Dropdowns
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(249, 249, 251, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition-smooth);
}

[data-theme="dark"] .navbar {
    background: rgba(11, 11, 15, 0.8);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 24px;
    }
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.5px;
}

.logo-point {
    width: 9px;
    height: 9px;
    background: var(--text-primary);
    border-radius: 50%;
    position: relative;
    transition: var(--transition-smooth);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a.active {
    color: var(--text-primary);
    font-weight: 600;
}

.nav-cta {
    background: var(--text-primary);
    color: var(--bg-primary) !important;
    padding: 7px 16px;
    border-radius: 30px;
    font-weight: 600 !important;
    transition: var(--transition-smooth) !important;
    box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.3rem;
}

@media (max-width: 768px) {
    .nav-links {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        padding: 100px 40px 40px 40px;
        gap: 28px;
        z-index: 99;
        opacity: 0;
        pointer-events: none;
        transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
        transform: translateY(-15px);
    }
    
    .nav-links.active {
        opacity: 0.98;
        pointer-events: auto;
        transform: translateY(0);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
    }

    .nav-links li {
        width: 100%;
        transform: translateY(20px);
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .nav-links.active li {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-links li:nth-child(1) { transition-delay: 0.1s; }
    .nav-links li:nth-child(2) { transition-delay: 0.15s; }
    .nav-links li:nth-child(3) { transition-delay: 0.2s; }
    .nav-links li:nth-child(4) { transition-delay: 0.25s; }
    .nav-links li:nth-child(5) { transition-delay: 0.3s; }

    .nav-links a {
        font-family: var(--font-heading);
        font-size: 2.2rem;
        font-weight: 700;
        letter-spacing: -1.2px;
        color: var(--text-secondary);
        display: flex;
        align-items: baseline;
        gap: 16px;
        transition: all 0.3s ease;
        text-decoration: none;
    }

    .nav-links a:hover {
        transform: translateX(8px);
        color: var(--text-primary);
    }

    .nav-cta {
        background: transparent !important;
        color: var(--text-secondary) !important;
        padding: 0 !important;
        border-radius: 0 !important;
        box-shadow: none !important;
    }

    .nav-cta:hover {
        color: var(--text-primary) !important;
    }

    .nav-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
        z-index: 100;
        width: 42px;
        height: 42px;
        border-radius: 50%;
        background: var(--bg-secondary);
        border: 1px solid var(--border);
        transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .nav-toggle:hover {
        border-color: var(--border-hover);
        transform: scale(1.05);
    }
    
    .mobile-menu-footer {
        margin-top: auto;
        padding-top: 32px;
        border-top: 1px solid var(--border);
        width: 100%;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .mobile-socials {
        display: flex;
        gap: 20px;
    }

    .mobile-socials a {
        font-family: var(--font-code);
        font-size: 0.72rem;
        text-transform: uppercase;
        color: var(--text-secondary);
        letter-spacing: 1px;
        text-decoration: none;
    }

    .mobile-meta {
        font-family: var(--font-code);
        font-size: 0.68rem;
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: 1.5px;
    }
}

/* ==========================================================================
   Hero Section - Clean & Typography Focused
   ========================================================================== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    padding-bottom: 80px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    width: 100%;
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
}

.hero-tag {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 30px;
    background: var(--bg-secondary);
    width: fit-content;
}

.hero-tag .tag-point {
    width: 6px;
    height: 6px;
    background: var(--accent-indigo);
    border-radius: 50%;
    display: inline-block;
    animation: pulseGlow 2s infinite alternate ease-in-out;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-title span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.6rem;
        letter-spacing: -1.2px;
    }
}

.hero-desc {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 30px;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    font-family: var(--font-body);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    opacity: 0.95;
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   AppGroup Interactive Data Flow Canvas (Stunning Visual Animation)
   ========================================================================== */
.flow-canvas-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 100%;
    height: 420px;
}

.flow-canvas {
    position: relative;
    width: 340px;
    height: 340px;
}

.flow-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90px;
    height: 90px;
    background: radial-gradient(circle, var(--accent) 0%, rgba(131,56,236,0.15) 100%);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.55rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    box-shadow: 0 0 30px var(--accent-glow);
    z-index: 10;
    animation: rotateRing 20s linear infinite;
}

.core-label {
    max-width: 60px;
    line-height: 1.3;
}

/* Device Simulator Anchors */
.canvas-device {
    position: absolute;
    background: #000;
    border: 3px solid #202024;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    z-index: 12;
    overflow: hidden;
}

.canvas-device:hover {
    transform: scale(1.08);
    box-shadow: var(--shadow-lg), 0 0 15px var(--accent);
}

.device-watch {
    top: 5%;
    left: 5%;
    width: 50px;
    height: 60px;
    border-radius: 10px;
}

.watch-screen {
    height: 100%;
    background: #050507;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 0.5rem;
}

.watch-hr {
    color: #ff2d55;
    font-weight: 700;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 2px;
}

.device-phone {
    top: 5%;
    right: 5%;
    width: 58px;
    height: 110px;
    border-radius: 14px;
}

.phone-screen-mini {
    height: 100%;
    background: linear-gradient(180deg, #120c1f 0%, #08050e 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 0.5rem;
}

.phone-metric {
    color: #ff3b30;
    font-weight: 700;
    margin-top: 6px;
}

.device-mac {
    bottom: 5%;
    left: 50%;
    transform: translateX(-50%);
    width: 110px;
    height: 66px;
    border-radius: 6px;
}

.mac-screen-mini {
    height: 100%;
    background: #0c0c0f;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 0.5rem;
}

.mac-terminal {
    color: #73daca;
    font-family: var(--font-code);
    margin-top: 4px;
}

/* SVG flows */
.flow-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    pointer-events: none;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

.flow-line {
    stroke: var(--border-hover);
    stroke-width: 1.5;
    stroke-dasharray: 6;
    animation: flowDash 8s linear infinite;
}

.flow-line.active {
    stroke: var(--accent);
    stroke-width: 2.5;
    animation-duration: 4s;
}

.flow-instructions {
    margin-top: 20px;
    font-size: 0.72rem;
    color: var(--text-muted);
}

@keyframes flowDash {
    to {
        stroke-dashoffset: -100;
    }
}

/* ==========================================================================
   Asymmetric Grid layout (Inspired by OpenAI's announcement cards)
   ========================================================================== */
.section {
    padding-top: 100px;
    padding-bottom: 100px;
    border-top: 1px solid var(--border);
    position: relative;
    background-color: transparent;
}

.section-tag {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 12px;
    display: block;
}

.section-header {
    margin-bottom: 60px;
    max-width: 600px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.3rem;
    font-weight: 800;
    letter-spacing: -1.2px;
    margin-bottom: 20px;
    line-height: 1.15;
}

.section-desc {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Grid Structure */
.asymmetric-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
    margin-bottom: 24px;
}

@media (max-width: 900px) {
    .asymmetric-grid {
        grid-template-columns: 1fr;
    }
}

/* Featured Large Mesh Gradient Card */
.asym-card-lg {
    background: var(--mesh-gradient);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-lg);
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 480px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
    color: #0d0d0e;
}

[data-theme="dark"] .asym-card-lg {
    background: linear-gradient(135deg, #1b122c 0%, #0d0818 100%);
    color: #f5f5f7;
    border-color: rgba(255, 255, 255, 0.04);
}

.asym-card-lg:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.asym-card-lg h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.asym-card-lg p {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.85;
    max-width: 480px;
}

/* Stacked smaller cards on the right */
.asym-stack {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.asym-card-sm {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    min-height: 228px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.asym-card-sm:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.asym-card-sm h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.asym-card-sm p {
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

.card-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 20px;
}

.card-link span {
    transition: var(--transition-fast);
}

.card-link:hover span {
    transform: translateX(4px);
}

/* ==========================================================================
   Project Device Simulator Grid (Hardware Screens)
   ========================================================================== */
.showcase-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
}

@media (max-width: 1024px) {
    .showcase-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 28px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    text-align: left;
}

.project-card.active {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    transform: translateX(6px);
}

.project-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-card p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

/* CSS simulated device frames */
.device-container {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    height: 500px;
    box-shadow: var(--shadow-md);
}

.sim-phone {
    width: 230px;
    height: 440px;
    background: #000;
    border: 8px solid #202024;
    border-radius: 36px;
    position: relative;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.05);
    overflow: hidden;
}

.sim-phone::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 18px;
    background: #000;
    border-radius: 9px;
    z-index: 10;
}

.phone-screen {
    height: 100%;
    background: #050507;
    color: #fff;
    padding: 32px 14px 14px 14px;
    font-size: 0.72rem;
    overflow-y: auto;
    position: relative;
}

.phone-screen img,
.mac-screen img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 5;
}

.sim-mac {
    width: 400px;
    height: 240px;
    background: #000;
    border: 10px solid #1c1c1f;
    border-radius: 12px 12px 0 0;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.sim-mac::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 460px;
    height: 6px;
    background: #2e2e30;
    border-radius: 0 0 120px 120px;
}

.mac-screen {
    height: 100%;
    background: #0d0d11;
    overflow: hidden;
}

/* ==========================================================================
   Xcode IDE Editor Playground (Inspired by Söhne Mono & dark tools)
   ========================================================================== */
.editor-window {
    background: #0d0d12;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.editor-header {
    height: 42px;
    background: #15151c;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
}

.editor-tabs {
    display: flex;
    height: 100%;
}

.editor-tab {
    padding: 0 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.72rem;
    color: #79798c;
    border-right: 1px solid rgba(255,255,255,0.05);
    cursor: pointer;
    transition: var(--transition-fast);
    height: 100%;
    font-family: var(--font-code);
}

.editor-tab.active {
    background: #0d0d12;
    color: #ffffff;
    border-bottom: 2px solid var(--accent);
}

/* Clean Xcode Orange Dot file indicators */
.editor-file-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
}

.doc-gym { background: #e0543c; }
.doc-bio { background: #34c759; }
.doc-term { background: #2997ff; }

.editor-btn.run-btn {
    background: rgba(41, 151, 255, 0.12);
    color: var(--accent);
    padding: 5px 12px;
    border-radius: 6px;
    border: 1px solid rgba(41, 151, 255, 0.2);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.editor-btn.run-btn:hover {
    background: rgba(41, 151, 255, 0.2);
}

.editor-body {
    display: grid;
    grid-template-columns: 1fr;
    height: 360px;
    position: relative;
}

.code-pane {
    padding: 20px;
    font-family: var(--font-code);
    font-size: 0.8rem;
    line-height: 1.5;
    overflow-y: auto;
    background: #0d0d12;
    text-align: left;
}

.code-keyword { color: #bb9af3; }
.code-type { color: #2ac3de; }
.code-func { color: #7cd5f5; }
.code-str { color: #9ece6a; }
.code-comment { color: #565f89; font-style: italic; }

.terminal-output-pane {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 120px;
    background: #07070a;
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 16px 20px;
    font-family: var(--font-code);
    font-size: 0.72rem;
    line-height: 1.4;
    overflow-y: auto;
    z-index: 10;
    transform: translateY(100%);
    transition: var(--transition-smooth);
}

.terminal-output-pane.open {
    transform: translateY(0);
}

/* ==========================================================================
   Expertise & Skills Grids
   ========================================================================== */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .expertise-grid {
        grid-template-columns: 1fr;
    }
}

.expertise-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.expertise-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.expertise-number {
    font-size: 0.7rem;
    font-family: var(--font-code);
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 20px;
    display: block;
}

.expertise-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.expertise-card p {
    font-size: 0.875rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.skill-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition-smooth);
}

.skill-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.skill-cat {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.skill-name {
    font-size: 0.95rem;
    font-weight: 600;
}

/* ==========================================================================
   Minimalist Contact Forms
   ========================================================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

@media (max-width: 900px) {
    .contact-container {
        grid-template-columns: 1fr;
    }
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.contact-form-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.form-group {
    position: relative;
    margin-bottom: 24px;
}

.form-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--text-primary);
}

.form-label {
    position: absolute;
    top: 10px;
    left: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    pointer-events: none;
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
    top: -12px;
    font-size: 0.72rem;
    color: var(--text-primary);
}

.form-textarea {
    min-height: 80px;
    resize: none;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    font-weight: 600;
}

.btn-primary:hover {
    opacity: 0.9;
}

.form-success-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 30px;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.form-success-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.success-icon {
    font-size: 2.5rem;
    color: #34c759;
    margin-bottom: 16px;
}

/* ==========================================================================
   Footer Elements
   ========================================================================== */
.footer {
    background: transparent;
    border-top: 1px solid var(--border);
    padding: 60px 0 30px 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 30px;
    margin-bottom: 30px;
}

.footer-socials {
    display: flex;
    gap: 20px;
    list-style: none;
}

.footer-socials a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-socials a:hover {
    color: var(--text-primary);
}

/* Simple Footer Hidden Theme Toggle Button styling */
.footer-theme-btn {
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    text-decoration: underline;
    transition: var(--transition-fast);
    padding: 0;
    margin: 0;
}

.footer-theme-btn:hover {
    color: var(--text-primary);
}

/* ==========================================================================
   Career Timeline & Pillars (About Page Specifics)
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

.timeline {
    border-left: 1px solid var(--border);
    padding-left: 24px;
    position: relative;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -29.5px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-primary);
    border: 2px solid var(--bg-primary);
}

.timeline-date {
    font-size: 0.72rem;
    font-family: var(--font-code);
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: left;
}

.timeline-desc {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-secondary);
    text-align: left;
}

.pillar-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .pillar-grid {
        grid-template-columns: 1fr;
    }
}

.pillar-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    text-align: left;
}

.pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.pillar-icon {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.pillar-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.pillar-card p {
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes rotateRing {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes pulseGlow {
    0% { transform: scale(1); box-shadow: 0 0 10px rgba(131,56,236,0.3); }
    100% { transform: scale(1.1); box-shadow: 0 0 15px rgba(131,56,236,0.6); }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Refinements & Custom Toggle Integrations (Handy Mobile Sync)
   ========================================================================== */

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.theme-toggle-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: rgba(0, 0, 0, 0.02);
    transform: scale(1.05);
}

[data-theme="dark"] .theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.02);
}

.theme-toggle-btn svg {
    width: 18px;
    height: 18px;
}

/* Horizontal Scrollable Tabs in Xcode editor on Mobile */
.editor-tabs {
    display: flex;
    height: 100%;
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
}

.editor-tabs::-webkit-scrollbar {
    display: none; /* Safari & Chrome */
}

.editor-tab {
    white-space: nowrap;
    flex-shrink: 0;
}

/* Dynamic Projects Details Block Styles */
.project-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    text-align: left;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .project-details-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

.tech-tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.tech-tag {
    font-family: var(--font-code);
    font-size: 0.72rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 6px;
    color: var(--text-secondary);
}

.detail-feature-card {
    border-left: 2px solid var(--accent);
    padding-left: 16px;
    margin-bottom: 20px;
}

.detail-feature-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.detail-feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Absolute Responsive Scaling for CSS Device Frames & Canvas */
@media (max-width: 480px) {
    .sim-mac {
        transform: scale(0.68);
        transform-origin: center center;
        margin-top: -30px;
    }
    .sim-phone {
        transform: scale(0.72);
        transform-origin: center center;
    }
    .device-container {
        height: 360px;
        padding: 10px;
        overflow: hidden;
    }
    .flow-canvas {
        transform: scale(0.85);
        transform-origin: center center;
    }
    .flow-canvas-container {
        height: 350px;
    }
    .hero {
        padding-top: 100px;
        padding-bottom: 40px;
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 2.2rem;
        letter-spacing: -1px;
    }
    .section-title {
        font-size: 1.8rem;
        letter-spacing: -0.8px;
    }
    .asym-card-lg {
        padding: 24px;
        min-height: 360px;
    }
    .asym-card-sm {
        padding: 24px;
        min-height: 180px;
    }
    .expertise-card, .pillar-card, .contact-form-card {
        padding: 24px;
    }
    .navbar-actions {
        gap: 8px;
    }
    .nav-container {
        padding: 0 16px;
    }
}

/* Glassmorphism backing overlays for unified ambient margins display */
.pillar-card, .expertise-card, .project-card, .asym-card-lg, .asym-card-sm, .contact-form-card {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* ==========================================================================
   Redesigned Design Portfolio Showcase (Editorial Masonry)
   ========================================================================== */
.portfolio-intro {
    margin-bottom: 60px;
}

.portfolio-filters {
    display: flex;
    gap: 12px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.filter-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.portfolio-grid-masonry {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 40px;
    width: 100%;
}

.portfolio-item {
    position: relative;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    grid-column: span 12;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Editorial Staggering Column Spans */
@media (min-width: 900px) {
    .span-7 { grid-column: span 7; }
    .span-5 { grid-column: span 5; }
    .span-6 { grid-column: span 6; }
    .span-8 { grid-column: span 8; }
    .span-4 { grid-column: span 4; }
    .span-12 { grid-column: span 12; }
    
    /* Give vertical staggering */
    .portfolio-item:nth-child(even) {
        margin-top: 30px;
    }
}

.portfolio-media-wrapper {
    background: var(--bg-secondary);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border);
    position: relative;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-sm);
}

.portfolio-media-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-media-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 40%, rgba(0, 0, 0, 0.6) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    display: flex;
    align-items: flex-end;
    padding: 30px;
    color: #fff;
    z-index: 2;
}

.portfolio-media-overlay h3 {
    font-size: 1.5rem;
    font-weight: 700;
    transform: translateY(10px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-item:hover .portfolio-media-wrapper {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.portfolio-item:hover .portfolio-media-wrapper img {
    transform: scale(1.05);
}

.portfolio-item:hover .portfolio-media-overlay {
    opacity: 1;
}

.portfolio-item:hover .portfolio-media-overlay h3 {
    transform: translateY(0);
}

.portfolio-details {
    padding: 24px 8px 12px 8px;
}

.portfolio-meta {
    font-family: var(--font-code);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.portfolio-meta-dot {
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.6;
}

.portfolio-title-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 10px;
}

.portfolio-item-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.portfolio-item-year {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.portfolio-item-desc {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Fade animation for JS transitions */
.portfolio-item.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
    border: none;
}

/* ==========================================================================
   Responsive Helper Class Definitions
   ========================================================================== */
.hero-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 500px;
    width: 100%;
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 60px;
}

.about-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin: 40px 0;
    padding: 24px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.toolbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.featured-project-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(41,151,255,0.05) 100%);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    padding: 40px;
}

.featured-project-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 30px;
}

.tech-projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

@media (max-width: 768px) {
    .featured-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .featured-project-card {
        padding: 24px;
    }
    .featured-project-flex {
        flex-direction: column-reverse;
        align-items: stretch;
        gap: 20px;
    }
    .featured-project-flex > div:last-child {
        align-self: flex-start;
        flex: 0 0 80px;
        width: 80px;
        height: 80px;
    }
    .featured-project-flex > div:last-child svg {
        width: 36px;
        height: 36px;
    }
    .tech-projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .toolbox-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero-showcase {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .about-stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 500px) {
    .hero-actions {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .hero-tag {
        font-size: 0.65rem;
        padding: 5px 12px;
        letter-spacing: 1px;
        white-space: normal;
        word-break: break-word;
        max-width: 100%;
    }
    .hero-title {
        font-size: 2rem;
        letter-spacing: -0.5px;
    }
    .portfolio-title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .portfolio-item-title {
        font-size: 1.2rem;
    }
    .portfolio-grid-masonry {
        gap: 24px;
    }
}