/* ========================================
   QIRA — Design System & Styles
   ======================================== */

:root {
    --color-bg: #0a0a0b;
    --color-bg-elevated: #111113;
    --color-bg-card: #16161a;
    --color-bg-card-hover: #1c1c21;
    --color-border: #2a2a30;
    --color-border-light: #1e1e24;
    --color-text: #e8e8ed;
    --color-text-secondary: #8b8b96;
    --color-text-tertiary: #5c5c66;
    --color-accent: #6366f1;
    --color-accent-hover: #818cf8;
    --color-accent-glow: rgba(99, 102, 241, 0.15);
    --color-success: #34d399;
    --color-error: #ef4444;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Noise texture overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Cursor Glow Follower
   ======================================== */
.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.06), transparent 70%);
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
    will-change: transform;
    opacity: 0;
}

.cursor-glow.active {
    opacity: 1;
}

/* ========================================
   Scroll Progress Bar
   ======================================== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    z-index: 1001;
    width: 0%;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 2px;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 8px 0;
    transition: var(--transition);
    background: transparent;
}

.nav.scrolled {
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    padding: 4px 0;
}

.nav.scrolled .nav-logo-icon {
    width: 44px;
    height: 44px;
}

.nav.scrolled .nav-logo-text {
    font-size: 18px;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo-icon {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    transition: var(--transition);
}

.nav-logo-icon img {
    width: 100%;
    height: 130%;
    object-fit: cover;
    object-position: center top;
}

.nav-logo-text {
    font-family: var(--font-sans);
    font-size: 22px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 3px;
    transition: var(--transition);
}

.nav-logo:hover {
    filter: drop-shadow(0 0 12px rgba(99, 102, 241, 0.4));
}

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

.nav-links a {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Active nav link indicator */
.nav-links a.active {
    color: var(--color-text);
}

.nav-links a.active::after {
    width: 100%;
    background: var(--color-accent);
}

.nav-cta {
    padding: 8px 20px !important;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    transition: var(--transition) !important;
}

.nav-cta:hover {
    border-color: var(--color-accent) !important;
    background: var(--color-accent-glow);
}

.nav-cta::after {
    display: none !important;
}

.nav-cta.active::after {
    display: none !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
    transform-origin: center;
}

/* Animated hamburger to X */
.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu backdrop */
.nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.nav-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

/* ========================================
   Buttons (Reactive)
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: var(--font-sans);
    border-radius: 100px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

/* Reactive glow pseudo-element */
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle 80px at var(--x, 50%) var(--y, 50%), rgba(255, 255, 255, 0.15), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(99, 102, 241, 0.4), 0 0 20px rgba(99, 102, 241, 0.15);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

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

.btn-secondary:hover {
    color: var(--color-text);
    border-color: var(--color-text-tertiary);
    background: rgba(255, 255, 255, 0.03);
    transform: translateY(-2px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Loading spinner state */
.btn-loading {
    pointer-events: none;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    left: 50%;
    top: 50%;
    margin-left: -10px;
    margin-top: -10px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   Hero
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

#hero-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding-top: 80px;
}

.hero-tag {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    max-width: 800px;
    background: linear-gradient(135deg, #e8e8ed 0%, #e8e8ed 70%, #818cf8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: 40px;
}

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

.hero-scroll {
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 1;
}

.hero-scroll span {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ========================================
   Sections (General)
   ======================================== */
.section {
    padding: 120px 0;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #e8e8ed 0%, #e8e8ed 65%, #818cf8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 48px;
}

/* ========================================
   Intro Section
   ======================================== */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.intro-text h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.intro-text p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.intro-stats {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.stat {
    padding: 24px;
    border-left: 2px solid var(--color-accent);
    transition: var(--transition);
}

.stat:hover {
    border-left-color: var(--color-accent-hover);
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.05), transparent 60%);
    padding-left: 28px;
}

.stat-number {
    font-size: 1.25rem;
    font-weight: 600;
    display: block;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ========================================
   Focus Cards (with cursor-tracking glow)
   ======================================== */
.section-focus {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.focus-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

/* Cursor-tracking radial glow */
.focus-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle 200px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.08), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 0;
}

.focus-card:hover::before {
    opacity: 1;
}

.focus-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.15), 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 0 20px rgba(99, 102, 241, 0.03);
}

.focus-icon {
    color: var(--color-accent);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.focus-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.focus-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ========================================
   Current Work
   ======================================== */
.current-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(99, 102, 241, 0.05) 100%);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 64px;
    position: relative;
    overflow: hidden;
}

.current-content {
    max-width: 560px;
}

.current-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.current-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.current-visual {
    position: relative;
    width: 200px;
    height: 200px;
    flex-shrink: 0;
}

.pulse-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    border: 1px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0;
    animation: pulse 3s ease-out infinite;
}

.pulse-ring.delay-1 { animation-delay: 1s; }
.pulse-ring.delay-2 { animation-delay: 2s; }

@keyframes pulse {
    0% { width: 12px; height: 12px; opacity: 0.6; }
    100% { width: 200px; height: 200px; opacity: 0; }
}

/* ========================================
   About
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.about-main h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.about-main p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.value {
    padding: 28px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.value::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle 200px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.06), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.value:hover::before {
    opacity: 1;
}

.value:hover {
    border-color: rgba(99, 102, 241, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.value h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-accent);
    position: relative;
    z-index: 1;
}

.value p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ========================================
   Research
   ======================================== */
.section-research {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

.research-areas {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: 80px;
}

.research-area {
    display: flex;
    gap: 40px;
    padding: 40px 0;
    padding-left: 0;
    border-bottom: 1px solid var(--color-border-light);
    border-left: 2px solid transparent;
    transition: var(--transition);
}

.research-area:first-child {
    border-top: 1px solid var(--color-border-light);
}

.research-area:hover {
    padding-left: 20px;
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.05), transparent 60%);
    border-left-color: var(--color-accent);
}

.research-area:hover .research-number {
    color: var(--color-accent);
}

.research-number {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    min-width: 40px;
    padding-top: 4px;
    transition: var(--transition);
}

.research-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.research-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.research-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.research-tags span {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 4px 12px;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-text-tertiary);
    transition: var(--transition);
}

.research-tags span:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-glow);
}

.research-publications {
    padding: 48px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg-elevated);
}

.research-publications h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.publication-entry {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.publication-year {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 600;
    padding-top: 2px;
    white-space: nowrap;
}

.publication-details h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.publication-authors {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.publication-desc {
    color: var(--color-text-tertiary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.publication-links span {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-accent);
    background: rgba(99, 102, 241, 0.1);
    padding: 4px 10px;
    border-radius: 4px;
}

/* ========================================
   Projects (with cursor-tracking glow)
   ======================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle 200px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.08), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 0;
}

.project-card:hover::before {
    opacity: 1;
}

.project-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.15), 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 0 20px rgba(99, 102, 241, 0.03);
}

.project-status {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-success);
    padding: 4px 12px;
    border: 1px solid rgba(52, 211, 153, 0.2);
    border-radius: 100px;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.project-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.project-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.project-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.project-meta span {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--color-text-tertiary);
    padding: 4px 10px;
    background: var(--color-bg);
    border-radius: 4px;
    transition: var(--transition);
}

.project-meta span:hover {
    color: var(--color-accent);
}

/* ========================================
   Infrastructure
   ======================================== */
.infra-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.infra-content h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.infra-content p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.infra-capabilities {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.infra-item {
    display: flex;
    gap: 20px;
    align-items: start;
    padding: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: var(--transition);
}

.infra-item:hover {
    border-color: var(--color-border-light);
    background: rgba(99, 102, 241, 0.03);
}

.infra-icon {
    color: var(--color-accent);
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.infra-item:hover .infra-icon {
    background: rgba(99, 102, 241, 0.2);
    transform: scale(1.05);
}

.infra-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.infra-item p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Supported By Badge */
.supported-by {
    margin-top: 28px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.supported-by-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.supported-by-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.supported-by-logo:hover {
    border-color: var(--color-border-light);
    background: var(--color-bg-card-hover);
}

.supported-by-logo span {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
}

.footer-supported {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-top: 6px;
}

/* ========================================
   Blog (with cursor-tracking glow)
   ======================================== */
.section-blog {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

.blog-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.blog-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 36px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle 200px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.08), transparent);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 0;
}

.blog-card:hover::before {
    opacity: 1;
}

.blog-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.15), 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 0 20px rgba(99, 102, 241, 0.03);
}

.blog-featured {
    grid-column: 1 / -1;
}

.blog-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    position: relative;
    z-index: 1;
}

a.blog-card {
    display: block;
    text-decoration: none;
    color: inherit;
}

/* Pulsing dot for date */
.blog-date::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
    0%, 100% { opacity: 0.4; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1.2); }
}

.blog-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.blog-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.blog-tags {
    display: flex;
    gap: 8px;
    position: relative;
    z-index: 1;
}

.blog-tags span {
    font-size: 0.6875rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 10px;
    background: var(--color-accent-glow);
    color: var(--color-accent);
    border-radius: 4px;
}

/* ========================================
   Team
   ======================================== */
.team-grid {
    display: flex;
    justify-content: center;
    margin-bottom: 48px;
}

.team-card {
    text-align: center;
    max-width: 400px;
}

.team-avatar-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 35%;
    margin: 0 auto 24px;
    transition: var(--transition);
    border: 2px solid var(--color-border-light);
}

.team-card:hover .team-avatar-img {
    transform: scale(1.08);
    box-shadow: 0 0 0 4px var(--color-bg), 0 0 0 6px var(--color-accent), 0 8px 30px rgba(99, 102, 241, 0.3);
    border-color: var(--color-accent);
}

.team-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), #a78bfa);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin: 0 auto 24px;
    transition: var(--transition);
}

.team-card:hover .team-avatar {
    transform: scale(1.08);
    box-shadow: 0 0 0 4px var(--color-bg), 0 0 0 6px var(--color-accent), 0 8px 30px rgba(99, 102, 241, 0.3);
}

.team-card h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.team-role {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.team-bio {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.team-note {
    text-align: center;
    padding: 32px;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
    max-width: 600px;
    margin: 0 auto;
}

.team-note p {
    color: var(--color-text-tertiary);
    font-size: 0.9375rem;
    font-style: italic;
}

/* ========================================
   Contact
   ======================================== */
.section-contact {
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-content h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.contact-content > p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.contact-types {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-type {
    padding: 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.contact-type:hover {
    background: rgba(99, 102, 241, 0.03);
}

.contact-type h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-type p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-tertiary);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235c5c66' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Form validation states */
.form-group.error input,
.form-group.error textarea,
.form-group.error select {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group.success input,
.form-group.success textarea,
.form-group.success select {
    border-color: var(--color-success);
    box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.1);
}

.form-error-msg {
    font-size: 0.75rem;
    color: var(--color-error);
    margin-top: 2px;
    display: none;
}

.form-group.error .form-error-msg {
    display: block;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 48px 0;
    border-top: 1px solid var(--color-border-light);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    cursor: pointer;
}

.footer-logo:hover {
    filter: drop-shadow(0 0 12px rgba(99, 102, 241, 0.4));
}

.footer-brand p {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    transition: var(--transition);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-copy p {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

/* ========================================
   Back to Top Button
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    cursor: pointer;
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
    transition: var(--transition);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.2);
    transform: translateY(-2px);
}

.back-to-top:active {
    transform: translateY(0);
}

/* ========================================
   Animations (Scroll Reveal)
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 968px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-bg-elevated);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        border-left: 1px solid var(--color-border-light);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.open {
        right: 0;
    }

    .intro-grid,
    .about-grid,
    .infra-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .focus-grid {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .current-banner {
        flex-direction: column;
        padding: 40px;
        text-align: center;
    }

    .current-visual {
        width: 150px;
        height: 150px;
    }

    .section {
        padding: 80px 0;
    }

    .hero-scroll {
        display: none;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .cursor-glow {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-sub {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        justify-content: center;
    }

    .section {
        padding: 60px 0;
    }

    .research-area {
        flex-direction: column;
        gap: 16px;
    }
}