/* ================================================================
   ARKIS — Design System
   Modern · Professional · Interactive
   ================================================================ */

/* === Tokens === */
:root {
    --bg: #0a0a0b;
    --bg-elevated: #111113;
    --bg-card: #161618;
    --bg-card-hover: #1c1c1f;

    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #52525b;

    --accent: #3b82f6;
    --accent-muted: rgba(59, 130, 246, 0.12);
    --accent-subtle: rgba(59, 130, 246, 0.06);
    --accent-glow: rgba(59, 130, 246, 0.15);

    --success: #22c55e;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
    --duration: 0.5s;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

/* === Custom Cursor (Desktop) === */
.cursor {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    pointer-events: none;
    mix-blend-mode: difference;
}

.cursor-dot {
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: -3px;
    left: -3px;
    transition: transform 0.15s var(--ease);
}

.cursor-ring {
    width: 36px;
    height: 36px;
    border: 1.5px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    position: absolute;
    top: -18px;
    left: -18px;
    transition: transform 0.4s var(--ease-out), opacity 0.3s ease, border-color 0.3s ease;
}

.cursor.hovering .cursor-ring {
    transform: scale(1.6);
    border-color: var(--accent);
    opacity: 0.6;
}

.cursor.hovering .cursor-dot {
    transform: scale(1.8);
}

.cursor.clicking .cursor-ring {
    transform: scale(0.8);
}

@media (pointer: fine) {
    .cursor { display: block; }
    body { cursor: none; }
    a, button, [data-magnetic] { cursor: none; }
}

/* === Mouse Glow === */
.mouse-glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.6s ease;
}

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

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

/* === Preloader === */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    transition: opacity 0.6s var(--ease), visibility 0.6s;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.preloader-mark {
    width: 40px;
    height: 40px;
    object-fit: contain;
    animation: preloaderPulse 1.2s ease-in-out infinite;
}

@keyframes preloaderPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.preloader-bar {
    width: 120px;
    height: 2px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.preloader-progress {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.06s linear;
}

/* === Page Layout === */
.page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 5vw, 4rem);
}

/* === Header === */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    transition: transform 0.4s var(--ease);
}

.logo:hover .logo-img {
    transform: rotate(-8deg) scale(1.05);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.4);
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 0.01em;
}

/* === Hero === */
.hero {
    position: relative;
    padding: clamp(4rem, 10vh, 8rem) 0 clamp(3rem, 6vh, 5rem);
    overflow: visible;
}

/* === Hero Background Logo === */
.hero-bg-logo {
    position: absolute;
    top: 50%;
    right: -8%;
    transform: translateY(-50%);
    width: clamp(280px, 45vw, 550px);
    height: clamp(280px, 45vw, 550px);
    pointer-events: none;
    z-index: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: transform, opacity;
}

.hero-bg-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.04;
    filter: blur(1px);
    animation: bgLogoFloat 12s ease-in-out infinite, bgLogoPulse 6s ease-in-out infinite;
    transition: opacity 0.6s ease;
}

.hero:hover .hero-bg-logo-img {
    opacity: 0.06;
}

@keyframes bgLogoFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
    }
    25% {
        transform: translateY(-12px) rotate(2deg) scale(1.02);
    }
    50% {
        transform: translateY(0) rotate(0deg) scale(1);
    }
    75% {
        transform: translateY(8px) rotate(-1.5deg) scale(0.99);
    }
}

@keyframes bgLogoPulse {
    0%, 100% { filter: blur(1px) brightness(1); }
    50% { filter: blur(0.5px) brightness(1.2); }
}

/* Glow behind the background logo */
.hero-bg-logo::before {
    content: '';
    position: absolute;
    inset: 10%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    animation: bgLogoGlow 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes bgLogoGlow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.15); }
}

/* Ensure hero text is above the background logo */
.hero-badge,
.hero-title,
.hero-description {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-muted);
    padding: 0.375rem 0.875rem;
    border-radius: 100px;
    letter-spacing: 0.02em;
    margin-bottom: 1.75rem;
    border: 1px solid rgba(59, 130, 246, 0.15);
    transition: transform 0.4s var(--ease), box-shadow 0.4s ease;
}

.hero-badge:hover {
    box-shadow: 0 0 20px var(--accent-glow);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 4.25rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.035em;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.hero-title-accent {
    background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 50%, #93c5fd 100%);
    background-size: 200% 200%;
    animation: gradientShift 4s ease-in-out infinite;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-description {
    font-size: clamp(1rem, 1.4vw, 1.125rem);
    color: var(--text-secondary);
    max-width: 520px;
    line-height: 1.75;
}

/* === Section === */
.projects {
    padding-bottom: clamp(3rem, 6vh, 5rem);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.section-title {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.section-count {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-tertiary);
    background: var(--bg-elevated);
    padding: 0.125rem 0.5rem;
    border-radius: 100px;
    border: 1px solid var(--border);
}

/* === Projects Grid === */
.projects-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

/* === Project Card === */
.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition:
        border-color 0.4s ease,
        box-shadow 0.4s ease;
    cursor: default;
    overflow: hidden;
    /* 3D tilt */
    transform-style: preserve-3d;
    will-change: transform;
}

/* Card internal glow that follows mouse */
.project-card-glow {
    position: absolute;
    inset: 0;
    z-index: 0;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    background: radial-gradient(
        400px circle at var(--glow-x, 50%) var(--glow-y, 50%),
        rgba(59, 130, 246, 0.08) 0%,
        transparent 70%
    );
}

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

/* Card shimmer line */
.project-card-shimmer {
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    z-index: 1;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.03), transparent);
    pointer-events: none;
    transition: none;
}

.project-card:hover .project-card-shimmer {
    animation: shimmer 0.8s ease forwards;
}

@keyframes shimmer {
    to { left: 150%; }
}

.project-card:hover {
    border-color: var(--border-hover);
    box-shadow:
        0 12px 40px -12px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(59, 130, 246, 0.08);
}

.project-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 2;
}

.project-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--accent-subtle);
    border: 1px solid rgba(59, 130, 246, 0.1);
    font-size: 0.9375rem;
    color: var(--accent);
    flex-shrink: 0;
    transition: background 0.3s ease, border-color 0.3s ease, transform 0.4s var(--ease);
}

.project-card:hover .project-card-icon {
    background: var(--accent-muted);
    border-color: rgba(59, 130, 246, 0.25);
    transform: scale(1.05);
}

.project-card-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    color: var(--text-tertiary);
    transition: color 0.3s ease, transform 0.4s var(--ease), background 0.3s ease;
}

.project-card-arrow svg {
    width: 14px;
    height: 14px;
}

.project-card:hover .project-card-arrow {
    color: var(--accent);
    transform: translate(3px, -3px);
    background: var(--accent-subtle);
}

.project-card-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 2;
}

.project-card-description {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1.25rem;
    flex: 1;
    position: relative;
    z-index: 2;
}

.project-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent);
    transition: gap 0.3s var(--ease);
    position: relative;
    z-index: 2;
}

.project-card-link svg {
    width: 12px;
    height: 12px;
    transition: transform 0.3s var(--ease);
}

.project-card:hover .project-card-link {
    gap: 0.5rem;
}

.project-card:hover .project-card-link svg {
    transform: translateX(2px);
}

/* === Animations — Entrance === */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

/* === Footer === */
.footer {
    margin-top: auto;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
}

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

.footer-brand {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

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

/* ================================================================
   RESPONSIVE — Desktop (large)
   ================================================================ */
@media (min-width: 1024px) {
    .page {
        max-width: 1040px;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .hero-title {
        font-size: 4.25rem;
    }

    .hero {
        padding: 8rem 0 5rem;
    }

    .hero-bg-logo {
        width: 550px;
        height: 550px;
        right: -10%;
    }

    .project-card {
        padding: 1.75rem;
    }
}

/* ================================================================
   RESPONSIVE — Tablet
   ================================================================ */
@media (min-width: 640px) and (max-width: 1023px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .hero-title {
        font-size: clamp(2.5rem, 5.5vw, 3.5rem);
    }
}

/* ================================================================
   RESPONSIVE — Mobile
   ================================================================ */
@media (max-width: 639px) {
    .page {
        padding: 0 1.125rem;
    }

    .header {
        padding: 1.25rem 0;
    }

    .header-status {
        display: none;
    }

    .hero {
        padding: 2.5rem 0 2rem;
    }

    .hero-bg-logo {
        width: 220px;
        height: 220px;
        right: -5%;
        top: 45%;
    }

    .hero-bg-logo-img {
        opacity: 0.03;
    }

    .hero-badge {
        font-size: 0.6875rem;
        padding: 0.3rem 0.75rem;
        margin-bottom: 1.25rem;
    }

    .hero-title {
        font-size: 2.25rem;
        letter-spacing: -0.025em;
        margin-bottom: 1rem;
    }

    .hero-description {
        font-size: 0.9375rem;
        line-height: 1.7;
    }

    .section-header {
        margin-bottom: 1rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .project-card {
        padding: 1.25rem;
    }

    .project-card-icon {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }

    .project-card-title {
        font-size: 1rem;
    }

    .project-card-description {
        font-size: 0.8125rem;
        margin-bottom: 1rem;
    }

    .footer {
        padding: 1.5rem 0;
    }

    .footer-inner {
        flex-direction: column;
        gap: 0.25rem;
        text-align: center;
    }
}

/* === Small mobile (< 375px) === */
@media (max-width: 374px) {
    .page {
        padding: 0 0.875rem;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .hero-description {
        font-size: 0.875rem;
    }
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .cursor { display: none !important; }
    .mouse-glow { display: none !important; }
}

/* === Touch devices — disable custom cursor === */
@media (pointer: coarse) {
    .cursor { display: none !important; }
    body { cursor: auto; }
    a, button, [data-magnetic] { cursor: pointer; }
    .mouse-glow { display: none !important; }
}

/* === Selection === */
::selection {
    background: var(--accent-muted);
    color: var(--text-primary);
}

/* === Scrollbar (Webkit) === */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}