@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;700&family=Sora:wght@600;700;800&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Base Theme Tokens */
:root {
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --bg-dark: #05040a;
    --accent-primary: #00f5d4;
    --accent-glow: #00bbf9;
    
    --text-primary: #000000;
    --text-secondary: #111115;
    --text-muted: #222228;

    /* Design Tokens (Gestalt Spacing Scale, Radius, Transitions) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 36px;
    --space-2xl: 48px;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 36px;
    --radius-pill: 100px;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 0.15s;
    --duration-normal: 0.3s;
}

/* Page-Specific Theme Overrides for Distinct Decision Points */
body[data-page="projects"] {
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --accent-primary: #3a86ff;
    --accent-glow: #8338ec;
}

body[data-page="skills"] {
    --font-heading: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
    --accent-primary: #9d4edd;
    --accent-glow: #c77dff;
}

body[data-page="about"] {
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --accent-primary: #ffb703;
    --accent-glow: #fb8500;
}

body[data-page="contact"] {
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --accent-primary: #ff007f;
    --accent-glow: #7928ca;
}

html, body {
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg-dark);
    background-image: url('wallpaper.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: var(--text-primary);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

#app-container {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 24px 60px 24px;
}

#liquid-glass-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* Universal WebGL Glass Container Base */
.glass-element {
    position: relative;
    z-index: 10;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
    will-change: transform;
}

/* Sticky Header Navigation */
.top-header {
    position: sticky;
    top: 24px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1140px;
    padding: 18px 36px;
    border-radius: 100px;
    margin-bottom: 48px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
    color: #000000;
    text-decoration: none;
}

.brand-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1rem;
    color: #ffffff;
    background: #000000;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-item {
    color: #000000;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    transition: color 0.25s ease, transform 0.2s ease;
    position: relative;
}

.nav-item.active {
    font-weight: 800;
}

.nav-item.active::after {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--accent-primary);
}

.nav-item:hover {
    color: #000000;
    transform: translateY(-1px);
}

.contact-btn {
    padding: 12px 28px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 700;
    color: #000000;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.25s ease;
}

/* Page Section Headers */
.page-title-banner {
    width: 100%;
    max-width: 1140px;
    margin-bottom: 36px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-title-banner h1 {
    font-family: var(--font-heading);
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #000000;
}

.page-title-banner p {
    font-size: 1.15rem;
    font-weight: 500;
    color: #111115;
    max-width: 720px;
}

/* Gestalt Bento Layout */
.bento-grid {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
    width: 100%;
    max-width: 1140px;
}

@media (max-width: 1024px) {
    .bento-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .span-2, .span-3 {
        grid-column: span 1 !important;
    }
}

.span-2 {
    grid-column: span 2;
}

.span-3 {
    grid-column: span 3;
}

/* Bento Card Geometry */
.bento-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 32px;
    padding: 48px;
    border-radius: 36px;
}

/* Category & Status Tags */
.card-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    border-radius: 100px;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #000000;
    width: fit-content;
}

/* Hero Section Typography */
.hero-card h1 {
    font-family: var(--font-heading);
    font-size: 3.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-top: 18px;
    margin-bottom: 16px;
    color: #000000;
}

.hero-subtitle {
    font-size: 1.18rem;
    font-weight: 500;
    line-height: 1.7;
    color: #111115;
    max-width: 680px;
    margin-bottom: 24px;
}

.education-pill {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    border-radius: 100px;
    font-size: 0.98rem;
    font-weight: 700;
    color: #000000;
}

/* Key Statistics Matrix */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 12px;
}

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

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 22px 16px;
    border-radius: 24px;
    text-align: center;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #000000;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: #111115;
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.social-row {
    display: flex;
    gap: 14px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 700;
    color: #000000;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease;
}

/* Project Deep-Dive Case Study Layout */
.case-study-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    padding: 48px;
    border-radius: 36px;
}

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

.case-study-content h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: #000000;
}

.case-study-metrics {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.15);
}

.metric-pill-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.95rem;
    font-weight: 700;
    color: #000000;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.7rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.25;
    color: #000000;
}

.tech-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 6px;
}

.tech-chip {
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #000000;
}

.project-bullets {
    display: flex;
    flex-direction: column;
    gap: 14px;
    list-style: none;
    margin-top: 16px;
}

.project-bullets li {
    position: relative;
    padding-left: 24px;
    font-size: 1rem;
    font-weight: 500;
    color: #111115;
    line-height: 1.7;
}

.project-bullets li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: #000000;
    font-size: 1.3rem;
    line-height: 1;
}

/* Skills Competency Progress Matrix */
.skills-full-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    width: 100%;
}

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

.skill-box-card {
    padding: 36px;
    border-radius: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-box-card h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: #000000;
}

.skill-meter-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.skill-meter-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 700;
    color: #000000;
}

.skill-meter-bar {
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: rgba(0, 0, 0, 0.12);
    overflow: hidden;
}

.skill-meter-fill {
    height: 100%;
    border-radius: 5px;
    background: #000000;
    transition: width 1s ease;
}

/* About & Leadership Vertical Timeline */
.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 32px;
    width: 100%;
}

.timeline-item {
    display: flex;
    gap: 24px;
    padding: 36px;
    border-radius: 32px;
}

.timeline-year {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: #000000;
    min-width: 110px;
}

.timeline-body h4 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: #000000;
    margin-bottom: 6px;
}

.timeline-body p {
    font-size: 1rem;
    font-weight: 500;
    color: #111115;
    line-height: 1.6;
}

/* Contact Page Interactive Form */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    width: 100%;
    max-width: 1140px;
}

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

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 48px;
    border-radius: 36px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: #000000;
}

.form-input {
    padding: 14px 20px;
    border-radius: 16px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: #000000;
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(0, 0, 0, 0.2);
    outline: none;
}

.form-input:focus {
    border-color: #000000;
    background: rgba(255, 255, 255, 0.7);
}

.submit-btn {
    padding: 16px 36px;
    border-radius: 100px;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 800;
    color: #ffffff;
    background: #000000;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
}

/* Static Footer Multi-Page Navigation Bar */
.page-nav-bar {
    position: relative;
    margin-top: 64px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 14px 28px;
    border-radius: 100px;
    width: fit-content;
    z-index: 10;
}

.page-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 100px;
    font-family: var(--font-heading);
    font-size: 0.92rem;
    font-weight: 800;
    color: #000000;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease;
}

/* Smooth Page Transition Styling */
#app-container {
    will-change: opacity, transform, filter;
}

/* Solid Settings Trigger Button */
.settings-toggle-btn {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 10000;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0d0b1a !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    cursor: pointer;
}

.settings-toggle-btn svg {
    width: 22px;
    height: 22px;
    stroke: #00f5d4;
    transition: transform 0.3s ease;
}

.settings-toggle-btn:hover svg {
    transform: rotate(45deg);
}

/* Solid Settings Control Panel Drawer */
.settings-drawer {
    position: fixed;
    top: 0;
    right: -420px;
    width: 380px;
    height: 100vh;
    z-index: 9999;
    padding: 80px 24px 40px 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: #0d0b1a !important;
    border-left: 1px solid rgba(255, 255, 255, 0.15) !important;
    box-shadow: -12px 0 40px rgba(0, 0, 0, 0.7) !important;
    color: #ffffff;
    transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.settings-drawer.open {
    right: 0;
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.settings-header h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
}

.control-value {
    font-family: monospace;
    font-size: 0.82rem;
    padding: 2px 6px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.12);
    color: #00f5d4;
}

.control-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    outline: none;
    accent-color: #00f5d4;
    cursor: pointer;
}

/* ==========================================================================
   Phase 1-6 Accessibility, Interaction & Design System Enhancements
   ========================================================================== */

/* 1. Skip Navigation Link (WCAG 2.4.1 Bypass Blocks) */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: #000000;
    color: #00f5d4;
    padding: 12px 24px;
    border-radius: 0 0 16px 16px;
    font-weight: 800;
    font-size: 0.95rem;
    z-index: 100000;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transition: top 0.2s var(--ease-out);
}

.skip-link:focus {
    top: 0;
    outline: 3px solid #00f5d4;
}

/* 2. Keyboard Focus Ring (WCAG 2.4.7 Focus Visible) */
:focus-visible {
    outline: 3px solid var(--accent-primary, #00f5d4) !important;
    outline-offset: 4px !important;
    border-radius: 8px !important;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
.settings-toggle-btn:focus-visible {
    outline: 3px solid var(--accent-primary, #00f5d4) !important;
    outline-offset: 4px !important;
}

/* 3. Minimum Touch Target Enforcement (WCAG 2.5.5 Target Size >= 44px) */
.nav-item,
.page-nav-btn,
.social-btn,
.contact-btn,
.submit-btn,
.settings-toggle-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}

/* 4. Tactile Micro-Interaction (Norman Feedback Principle) */
.social-btn:active,
.page-nav-btn:active,
.contact-btn:active,
.submit-btn:active,
.settings-toggle-btn:active {
    transform: scale(0.95) !important;
    transition: transform var(--duration-fast) var(--ease-out) !important;
}

/* 5. SPA Transition Progress Bar (Nielsen #1: System Status Visibility) */
#nav-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--accent-primary, #00f5d4);
    box-shadow: 0 0 10px var(--accent-glow, #00bbf9);
    z-index: 100001;
    transition: width 0.25s linear, opacity 0.3s ease;
    pointer-events: none;
    opacity: 0;
}

#nav-progress-bar.active {
    opacity: 1;
}

/* 6. Settings Accordion Headers (Hick's Law - Progressive Disclosure) */
.settings-accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.07);
    border-radius: 12px;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: #ffffff;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.2s ease;
    user-select: none;
    margin-top: 10px;
}

.settings-accordion-header:hover {
    background: rgba(255, 255, 255, 0.14);
}

.settings-accordion-header .chevron {
    transition: transform 0.25s ease;
    font-size: 0.8rem;
    color: #00f5d4;
}

.settings-accordion-header.expanded .chevron {
    transform: rotate(180deg);
}

.settings-accordion-content {
    display: none;
    flex-direction: column;
    gap: 12px;
    padding: 12px 8px 4px 8px;
}

.settings-accordion-content.open {
    display: flex;
}

/* 7. Toast Notification Component */
.toast-notification {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: #0d0b1a;
    color: #ffffff;
    border: 1px solid var(--accent-primary, #00f5d4);
    padding: 16px 24px;
    border-radius: 16px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 700;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 100002;
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.35s var(--ease-spring), opacity 0.35s ease;
    pointer-events: none;
}

.toast-notification.show {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

/* 8. Reduced Motion Support (WCAG 2.3.3 Animation from Interactions) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    #liquid-glass-canvas {
        opacity: 0.5 !important;
    }
}