/* ============================================
   MEDEV Studios — Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #0a0e17;
    --color-bg-elevated: #111827;
    --color-bg-card: #151d2e;
    --color-bg-card-hover: #1a2540;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);

    --color-text: #e8ecf4;
    --color-text-secondary: #8892a4;
    --color-text-muted: #5a6478;

    --color-accent: #22d3ee;
    --color-accent-light: #67e8f9;
    --color-accent-dark: #0891b2;
    --color-accent-glow: rgba(34, 211, 238, 0.15);
    --color-accent-glow-strong: rgba(34, 211, 238, 0.3);

    --color-secondary: #1e3a5f;
    --color-gradient-start: #0e7490;
    --color-gradient-end: #22d3ee;

    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    --container-max: 1100px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul { list-style: none; }

button {
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
    color: inherit;
}

::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* --- Particle Canvas --- */
#particle-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* --- Container --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* --- Section --- */
.section {
    position: relative;
    z-index: 1;
    padding: var(--space-5xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: var(--color-accent-glow);
    border: 1px solid rgba(34, 211, 238, 0.2);
    padding: var(--space-xs) var(--space-md);
    border-radius: 100px;
    margin-bottom: var(--space-lg);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--color-text);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-md);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   NAVIGATION
   ============================================ */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

#site-header.scrolled {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    box-shadow: 0 1px 0 var(--color-border);
}

#main-nav {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    z-index: 101;
}

#nav-logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.nav-logo-text {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    background: var(--color-surface);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    z-index: 101;
    padding: var(--space-sm);
}

.hamburger-line {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-fast);
}

/* ============================================
   HERO
   ============================================ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-logo-wrapper {
    position: relative;
    margin-bottom: var(--space-2xl);
}

.hero-logo {
    width: 160px;
    height: 160px;
    border-radius: var(--radius-lg);
    filter: drop-shadow(0 0 40px var(--color-accent-glow-strong));
    animation: logoFloat 6s ease-in-out infinite;
}

.logo-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, var(--color-accent-glow-strong) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: glowPulse 4s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(3rem, 10vw, 5.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
}

.title-line.accent {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-gradient-start));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-family: var(--font-mono);
    font-size: clamp(0.85rem, 2vw, 1rem);
    color: var(--color-text-secondary);
    letter-spacing: 0.06em;
    margin-bottom: var(--space-3xl);
}

.hero-cta-group {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.8rem 1.8rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-dark), var(--color-accent));
    color: var(--color-bg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-accent-glow-strong);
}

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

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(34, 211, 238, 0.08);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ============================================
   ABOUT
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.about-lead {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

.about-lead strong {
    color: var(--color-accent);
}

.about-body {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.85;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.stat-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateX(4px);
}

.stat-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.stat-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ============================================
   FOCUS CARDS
   ============================================ */
.focus-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.focus-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.focus-card-inner {
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.focus-card:hover .focus-card-inner {
    border-color: rgba(34, 211, 238, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px var(--color-accent-glow);
}

.focus-icon-wrapper {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
    transition: background var(--transition-base);
}

.focus-card:hover .focus-icon-wrapper {
    background: var(--color-accent-glow-strong);
}

.focus-icon {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.focus-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.focus-card-desc {
    font-size: 0.925rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    flex-grow: 1;
}

.focus-card-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

/* ============================================
   PHILOSOPHY
   ============================================ */
.philosophy-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    max-width: 700px;
    margin: 0 auto;
}

.philosophy-block {
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.philosophy-block:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
}

.philosophy-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.25;
    line-height: 1;
    flex-shrink: 0;
    min-width: 48px;
}

.philosophy-text h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.philosophy-text p {
    font-size: 0.925rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

/* ============================================
   CONNECT
   ============================================ */
.connect-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.connect-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.connect-card:hover {
    border-color: rgba(34, 211, 238, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 30px var(--color-accent-glow);
}

.connect-card-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
    transition: transform var(--transition-spring);
}

.connect-card:hover .connect-card-icon {
    transform: scale(1.1);
}

.connect-card-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.connect-card-handle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.connect-card-arrow {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    opacity: 0;
    transform: translate(-4px, 4px);
    transition: all var(--transition-base);
}

.connect-card:hover .connect-card-arrow {
    opacity: 1;
    transform: translate(0, 0);
}

/* ============================================
   FOOTER
   ============================================ */
#site-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer-logo {
    width: 28px;
    height: 28px;
    border-radius: 4px;
}

.footer-name {
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-social {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-social:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

@keyframes scrollPulse {
    0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; }
}

/* Intersection Observer reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-links {
        position: fixed;
        inset: 0;
        background: rgba(10, 14, 23, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-lg);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav-links.open {
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        font-size: 1.25rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .hamburger-line:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active .hamburger-line:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero-logo { width: 120px; height: 120px; }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

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

    .philosophy-block {
        flex-direction: column;
        gap: var(--space-md);
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    .section {
        padding: var(--space-3xl) 0;
    }
    .hero-title {
        font-size: 2.5rem;
    }
}