/* ============================================
   Kage (影) - Main Stylesheet
   Design: Cyber Ninja / Shadow Steward
   ============================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--ninja-black);
    overflow-x: hidden;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

body.loading {
    overflow: hidden;
}

/* === Custom Cursor === */
#cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 40px;
    height: 40px;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    mix-blend-mode: difference;
}

.cursor-circle {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 1px solid var(--ninja-cyan);
    border-radius: 50%;
    transition: transform 0.2s ease;
}

.cursor-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    background: var(--ninja-red);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

/* === Intro Sequence === */
#intro {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9000;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: pointer-events 0.5s;
}

body.loaded #intro {
    pointer-events: none;
}

.intro-panel {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background: var(--ninja-black);
    z-index: 1;
    transition: transform 1s cubic-bezier(0.77, 0, 0.175, 1);
}

.intro-panel.left {
    left: 0;
    border-right: 1px solid var(--ninja-purple);
}

.intro-panel.right {
    right: 0;
    border-left: 1px solid var(--ninja-purple);
}

body.loaded .intro-panel.left {
    transform: translateX(-100%);
}

body.loaded .intro-panel.right {
    transform: translateX(100%);
}

.intro-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: opacity 0.5s ease;
}

body.loaded .intro-content {
    opacity: 0;
}

.loader-line {
    width: 0;
    height: 2px;
    background: var(--ninja-cyan);
    margin-top: 20px;
    animation: loadLine 2s ease-in-out forwards;
}

@keyframes loadLine {
    0% { width: 0; }
    100% { width: 200px; }
}

/* === Backgrounds === */
#webgl-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
}

.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.05;
    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='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    pointer-events: none;
}

/* === Navigation HUD === */
.hud-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: 'Orbitron', sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.logo .kanji {
    color: var(--ninja-red);
}

.links {
    display: flex;
    gap: 3rem;
}

.nav-item {
    position: relative;
    text-decoration: none;
    color: var(--text-primary);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    letter-spacing: 1px;
    overflow: hidden;
    padding: 0.5rem 0;
}

.nav-item::before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: var(--ninja-cyan);
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.nav-item:hover::before {
    transform: translateY(0);
}

.nav-item span {
    display: block;
    transition: transform 0.3s ease;
}

.nav-item:hover span {
    transform: translateY(-100%);
}

.actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-btn {
    background: none;
    border: 1px solid var(--ninja-cyan);
    color: var(--ninja-cyan);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.github-btn {
    color: var(--text-primary);
    transition: all 0.3s ease;
    filter: drop-shadow(0 0 0 transparent);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.github-btn:hover {
    color: var(--ninja-cyan);
    filter: drop-shadow(0 0 8px var(--ninja-cyan));
    transform: scale(1.1) rotate(5deg);
}

::selection {
    background: var(--ninja-red);
    color: #fff;
}

/* === Hero Section === */
.section {
    min-height: 100vh;
    padding: 6rem 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.hero {
    align-items: flex-start;
}

.hero-content {
    max-width: 800px;
    z-index: 10;
}

.hero-subtitle {
    font-family: 'Syncopate', sans-serif;
    font-size: 1rem;
    letter-spacing: 4px;
    color: var(--ninja-cyan);
    margin-bottom: 1rem;
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 8rem;
    line-height: 1;
    font-weight: 900;
    margin-bottom: 2rem;
    position: relative;
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

/* Glitch Effect */
.glitch-layer {
    position: relative;
}

.glitch-layer::before,
.glitch-layer::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--ninja-black);
}

.glitch-layer::before {
    left: 2px;
    text-shadow: -1px 0 var(--ninja-red);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch-layer::after {
    left: -2px;
    text-shadow: -1px 0 var(--ninja-cyan);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(2px, 9999px, 5px, 0); }
    5% { clip: rect(45px, 9999px, 16px, 0); }
    10% { clip: rect(12px, 9999px, 78px, 0); }
    15% { clip: rect(89px, 9999px, 12px, 0); }
    20% { clip: rect(23px, 9999px, 67px, 0); }
    25% { clip: rect(67px, 9999px, 34px, 0); }
    30% { clip: rect(2px, 9999px, 89px, 0); }
    35% { clip: rect(45px, 9999px, 2px, 0); }
    40% { clip: rect(9px, 9999px, 56px, 0); }
    45% { clip: rect(78px, 9999px, 23px, 0); }
    50% { clip: rect(12px, 9999px, 67px, 0); }
    55% { clip: rect(56px, 9999px, 12px, 0); }
    60% { clip: rect(34px, 9999px, 89px, 0); }
    65% { clip: rect(89px, 9999px, 34px, 0); }
    70% { clip: rect(23px, 9999px, 56px, 0); }
    75% { clip: rect(67px, 9999px, 12px, 0); }
    80% { clip: rect(12px, 9999px, 78px, 0); }
    85% { clip: rect(45px, 9999px, 34px, 0); }
    90% { clip: rect(89px, 9999px, 56px, 0); }
    95% { clip: rect(23px, 9999px, 12px, 0); }
    100% { clip: rect(67px, 9999px, 45px, 0); }
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 3rem;
    border-left: 2px solid var(--ninja-red);
    padding-left: 1rem;
}

/* Cyber Button */
.cyber-btn {
    position: relative;
    display: inline-flex;
    padding: 1rem 2rem;
    background: transparent;
    border: 1px solid var(--ninja-cyan);
    color: var(--ninja-cyan);
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 2px;
    overflow: hidden;
    transition: 0.3s;
}

.cyber-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
    text-shadow: 0 0 8px var(--ninja-cyan);
}

.btn-glitch {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--ninja-cyan);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: -1;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    font-family: 'Syncopate', sans-serif;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.scroll-indicator .line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--ninja-cyan), transparent);
}

/* === Features Section (Scrolls) === */
.features {
    align-items: center;
}

.section-header {
    margin-bottom: 4rem;
    text-align: center;
    position: relative;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px var(--text-primary);
    position: relative;
}

.section-title::before {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    color: var(--text-primary);
    clip-path: polygon(0 0, 100% 0, 100% 50%, 0 50%);
    transform: translateY(-5px);
    transition: transform 0.3s ease;
}

.section-title:hover::before {
    transform: translateY(0);
}

.section-line {
    width: 100px;
    height: 4px;
    background: var(--ninja-red);
    margin: 1rem auto;
    box-shadow: 0 0 10px var(--ninja-red);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
}

@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
    transform-style: preserve-3d;
}

.feature-card:hover {
    border-color: var(--ninja-cyan);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    transform: translateZ(20px);
}

.feature-card h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    transform: translateZ(30px);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    transform: translateZ(20px);
}

.card-border {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--ninja-cyan);
    transition: width 0.3s ease;
}

.feature-card:hover .card-border {
    width: 100%;
}

/* === Commands Section (Jutsu) === */
.commands {
    justify-content: center;
    align-items: center;
}

.terminal-wrapper {
    width: 100%;
    max-width: 900px;
    background: rgba(10, 10, 15, 0.9);
    border: 1px solid #333;
    border-radius: 8px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.terminal-header {
    background: #1a1a1a;
    padding: 0.8rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid #333;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-title {
    margin-left: 1rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
    color: #888;
}

.terminal-body {
    padding: 2rem;
    font-family: 'Fira Code', monospace;
    min-height: 400px;
}

.command-line {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    font-size: 1.2rem;
}

.prompt {
    color: var(--ninja-cyan);
}

#typewriter {
    color: var(--text-primary);
}

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

.cmd-item {
    padding: 0.5rem;
    border-left: 2px solid var(--ninja-purple);
    padding-left: 1rem;
    opacity: 0;
    animation: fadeIn 0.5s forwards;
}

.cmd-name {
    color: var(--ninja-red);
    font-weight: bold;
    margin-right: 0.5rem;
}

.cmd-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* === Footer === */
.footer {
    padding: 4rem 2rem;
    background: var(--ninja-black);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-links {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

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

/* === Responsive === */
@media (max-width: 768px) {
    .hero-title {
        font-size: 4rem;
    }
    
    .hud-nav {
        padding: 1.5rem;
    }
    
    .links {
        display: none; /* Mobile menu needed if strictly required, for now hiding */
    }
    
    .section {
        padding: 4rem 1.5rem;
    }
    
    .output-grid {
        grid-template-columns: 1fr;
    }
}