@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;600;700&family=Noto+Sans+JP:wght@400;900&display=swap');

:root {
    --bg-dark: #050505;
    --blood-red: #B20000;
    --akatsuki-red: #da1f26;
    --text-light: #d1d5db;
    --text-muted: #6b7280;
    --terminal-bg: #0a0a0a;
    --gdb-blue: #3b82f6;
    --gdb-green: #10b981;
    --amber: #facc15;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Fira Code', monospace;
    overflow-x: hidden;
}

/* CRT Scanlines */
.scanlines {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: repeating-linear-gradient(0deg, rgba(0,0,0,0) 0px, rgba(0,0,0,0) 1px, rgba(0,0,0,0.15) 1px, rgba(0,0,0,0.15) 2px);
    pointer-events: none; z-index: 9998;
}

/* Scroll Indicator */
.scroll-indicator {
    position: fixed; top: 0; left: 0; width: 4px; height: 0%;
    background: linear-gradient(180deg, var(--blood-red), var(--amber));
    z-index: 9999; box-shadow: 0 0 10px var(--blood-red); transition: height 0.1s;
}
.scroll-addr {
    position: fixed; top: 10px; left: 12px;
    color: var(--blood-red); font-size: 0.7rem;
    z-index: 9999; opacity: 0.8; writing-mode: vertical-lr; letter-spacing: 1px;
}

/* Pwndbg BG Columns */
.pwndbg-bg {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -2; display: flex; pointer-events: none; overflow: hidden;
}
.pwndbg-col {
    flex: 1; overflow: hidden; white-space: pre;
    font-size: 0.72rem; line-height: 1.35;
    color: var(--blood-red); opacity: 0.18;
    animation: scrollCol linear infinite; padding: 0 4px;
}
.pwndbg-col:nth-child(odd) { animation-direction: normal; }
.pwndbg-col:nth-child(even) { animation-direction: reverse; color: rgba(59,130,246,0.15); }
.pwndbg-col:nth-child(3n) { color: rgba(16,185,129,0.12); }
@keyframes scrollCol {
    0% { transform: translateY(-50%); }
    100% { transform: translateY(0%); }
}

/* Amaterasu Particles */
.ember {
    position: fixed; border-radius: 50%;
    pointer-events: none; z-index: -1; filter: blur(2px) contrast(1.2);
    animation: riseEmber linear infinite;
}
@keyframes riseEmber {
    0%   { transform: translateY(110vh) translateX(0) scale(0); opacity: 0; }
    10%  { opacity: 1; transform: translateY(90vh) translateX(10px) scale(1); }
    50%  { opacity: 0.8; transform: translateY(50vh) translateX(-15px) scale(1.5); }
    90%  { opacity: 0.5; transform: translateY(10vh) translateX(20px) scale(0.8); }
    100% { transform: translateY(-5vh) translateX(0) scale(0); opacity: 0; }
}

/* 🔥 Amaterasu Cursor Trail */
.cursor-flame {
    position: fixed; pointer-events: none; z-index: 9997;
    border-radius: 50%;
    background: radial-gradient(circle at center, #000000 0%, #1a0000 50%, rgba(178,0,0,0) 100%);
    box-shadow: 0 0 12px 3px #ff0000, inset 0 0 5px #000;
    filter: blur(1px);
    transform: none; transition: none;
}

/* Container */
.container {
    max-width: 1000px; margin: 0 auto;
    padding: 80px 20px; display: flex;
    flex-direction: column; gap: 100px;
}

/* Header */
header {
    text-align: center; position: relative;
    padding: 60px 0; min-height: 70vh;
    display: flex; flex-direction: column;
    justify-content: center; align-items: center;
}

.sharingan-svg {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 380px; height: 380px; z-index: -1; opacity: 0.25;
}
.sharingan-svg .outer-ring { fill: none; stroke: var(--blood-red); stroke-width: 1.5; }
.sharingan-svg .tomoe { fill: var(--blood-red); animation: spinTomoe 6s linear infinite; transform-origin: 50% 50%; }
@keyframes spinTomoe { 100% { transform: rotate(360deg); } }

h1 {
    font-size: 4.5rem; font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 2px;
    
    /* Amaterasu fire text masking */
    background: linear-gradient(0deg, #000000 5%, #1a0000 25%, var(--blood-red) 50%, #000000 80%, #000000 100%);
    background-size: 100% 300%;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    animation: amaterasuBurnText 2s ease-in-out infinite alternate;
}

@keyframes amaterasuBurnText {
    0% { background-position: 0% 100%; filter: drop-shadow(0 0 8px rgba(178,0,0,0.6)); }
    100% { background-position: 0% 0%; filter: drop-shadow(0 0 20px rgba(178,0,0,1)); }
}
h1 .prefix { color: var(--blood-red); }
h1 .cursor-blink { animation: blink 1s step-end infinite; color: var(--gdb-green); }
@keyframes blink { 50% { opacity: 0; } }

.typewriter {
    overflow: hidden; white-space: nowrap;
    border-right: 2px solid var(--blood-red);
    font-size: 1rem; color: var(--text-muted); width: 0;
    animation: typing 3s steps(50, end) 0.5s forwards, blinkCaret 0.75s step-end infinite;
}
@keyframes typing { from { width: 0 } to { width: 38ch } }
@keyframes blinkCaret { 50% { border-color: transparent; } }

/* Stats */
.stats-bar {
    display: flex; gap: 40px; margin-top: 50px;
    justify-content: center; flex-wrap: wrap;
}
.stat { text-align: center; position: relative; }
.stat-number {
    font-size: 3rem; font-weight: 700; color: #fff;
    text-shadow: 0 0 10px var(--blood-red);
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.stat::after {
    content: ''; position: absolute; bottom: -10px; left: 50%;
    transform: translateX(-50%); width: 30px; height: 2px; background: var(--blood-red);
}

/* Genjutsu Transition Overlay */
.genjutsu-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: 10000; pointer-events: none; display: flex; flex-direction: column;
    justify-content: center; align-items: center; overflow: hidden;
}
.eyelid {
    position: absolute; left: 0; width: 100%; height: 50vh;
    background: #000;
    transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.eyelid-top { top: 0; transform: translateY(-100%); }
.eyelid-bottom { bottom: 0; transform: translateY(100%); }

.genjutsu-overlay.closing .eyelid-top { transform: translateY(0); }
.genjutsu-overlay.closing .eyelid-bottom { transform: translateY(0); }

/* Initially closed for opening on load */
.genjutsu-overlay.opening .eyelid-top { transform: translateY(-100%); }
.genjutsu-overlay.opening .eyelid-bottom { transform: translateY(100%); }
.genjutsu-overlay.initial-closed .eyelid-top { transform: translateY(0); transition: none; }
.genjutsu-overlay.initial-closed .eyelid-bottom { transform: translateY(0); transition: none; }

.genjutsu-eye {
    position: absolute; top: 50%; left: 50%; width: 200px; height: 200px;
    transform: translate(-50%, -50%) scale(0.5); opacity: 0;
    transition: all 0.5s ease; z-index: 10001;
    border-radius: 50%; overflow: hidden;
}
.genjutsu-overlay.closing .genjutsu-eye {
    opacity: 1; transform: translate(-50%, -50%) scale(1); transition-delay: 0.1s;
    filter: drop-shadow(0 0 40px var(--blood-red));
}
.genjutsu-eye svg { width: 100%; height: 100%; border-radius: 50%; overflow: hidden; }

/* Base Sharingan */
.base-sharingan, .mangekyo { transform-origin: 100px 100px; }
.genjutsu-overlay.closing .base-sharingan {
    animation: evolveBase 1.2s cubic-bezier(0.5, 0, 1, 1) forwards;
}
@keyframes evolveBase {
    0% { opacity: 1; transform: rotate(0deg) scale(1); }
    50% { opacity: 1; transform: rotate(720deg) scale(1); }
    70% { opacity: 0; transform: rotate(1080deg) scale(0.5); }
    100% { opacity: 0; transform: rotate(1440deg) scale(0); }
}

/* Base spin for the tomoe */
@keyframes spinTomoe { 100% { transform: rotate(360deg); } }
.base-sharingan .tomoe {
    animation: spinTomoe 6s linear infinite;
    transform-origin: 100px 100px;
}
.genjutsu-overlay.closing .base-sharingan .tomoe {
    animation-duration: 0.15s;
}

/* Sasuke EMS */
.genjutsu-overlay.closing .mangekyo {
    animation: evolveMangekyo 1.2s cubic-bezier(0.2, 0, 0, 1) forwards;
    animation-delay: 0.2s;
}
@keyframes evolveMangekyo {
    0% { opacity: 0; transform: rotate(0deg) scale(0.5); }
    50% { opacity: 1; transform: rotate(720deg) scale(1.2); }
    100% { opacity: 1; transform: rotate(1080deg) scale(1); }
}

/* Sections */
.section-title {
    font-size: 2rem; color: var(--text-light);
    border-bottom: 1px solid var(--blood-red);
    padding-bottom: 10px; margin-bottom: 40px;
    display: flex; align-items: center; gap: 15px;
}
.section-title::before { content: '0x00'; color: var(--blood-red); font-size: 1rem; }
.section-title .kanji-inline {
    font-family: 'Noto Sans JP', sans-serif; font-weight: 900;
    color: var(--blood-red); font-size: 2.5rem;
    text-shadow: 0 0 10px var(--blood-red);
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* Challenge Cards */
.mem-card {
    background: #0c0c0c; border: 1px solid #1a1a1a;
    border-left: 4px solid var(--blood-red);
    padding: 25px; position: relative; cursor: pointer;
    transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    opacity: 0; transform: translateX(-40px);
    text-decoration: none; color: inherit; display: block;
}
.mem-card.visible { opacity: 1; transform: translateX(0); transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1); }
.mem-card:hover {
    transform: translateY(-4px) scale(1.02);
    border: 1px solid var(--blood-red);
    border-left: 4px solid var(--blood-red);
    box-shadow: -10px 0 30px rgba(178,0,0,0.2), inset 0 0 30px rgba(178,0,0,0.05);
    background: #110404;
}
.mem-card:active {
    transform: scale(0.97);
    transition: transform 0.1s ease;
}
.mem-card::before {
    content: '⚠ SEGFAULT'; position: absolute;
    top: 50%; left: -25px; transform: translateY(-50%) rotate(-90deg);
    color: var(--blood-red); font-weight: bold; font-size: 0.7rem;
    opacity: 0; transition: 0.4s; letter-spacing: 3px;
}
.mem-card:hover::before { opacity: 1; left: 5px; }
.mem-card::after {
    content: ''; position: absolute; top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(178,0,0,0.1), transparent);
    transform: translateX(-100%); transition: none;
}
.mem-card:hover::after { animation: cardFlash 0.5s ease; }
@keyframes cardFlash {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.card-meta {
    display: flex; justify-content: space-between;
    color: var(--blood-red); font-size: 0.8rem; margin-bottom: 10px;
}
.difficulty { display: inline-flex; gap: 3px; }
.diff-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: #333; border: 1px solid #555;
}
.diff-dot.filled { background: var(--blood-red); border-color: var(--blood-red); box-shadow: 0 0 5px var(--blood-red); }

.card-title { font-size: 1.5rem; color: #fff; margin-bottom: 12px; }
.card-title .func { color: var(--amber); }
.card-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.kanji-mark {
    position: absolute; bottom: 8px; right: 15px;
    font-family: 'Noto Sans JP', sans-serif; font-size: 2.5rem;
    color: rgba(178,0,0,0.06); font-weight: 900; transition: all 0.4s;
}
.mem-card:hover .kanji-mark {
    color: rgba(178,0,0,0.25);
    text-shadow: 0 0 15px var(--blood-red);
    transform: scale(1.15) rotate(-5deg);
}

/* ===== Challenge Detail Page ===== */
.back-link {
    color: var(--text-muted); text-decoration: none;
    font-size: 0.9rem; transition: color 0.3s;
    display: inline-flex; align-items: center; gap: 8px;
}
.back-link:hover { color: var(--blood-red); }

.chall-header {
    border-bottom: 1px solid var(--blood-red);
    padding-bottom: 25px; margin-bottom: 40px;
}
.chall-header h1 {
    font-size: 3rem; margin-bottom: 10px;
}
.chall-meta-row {
    display: flex; gap: 20px; flex-wrap: wrap;
    color: var(--text-muted); font-size: 0.85rem;
}
.chall-meta-row span { display: flex; align-items: center; gap: 6px; }
.tag {
    background: rgba(178,0,0,0.2); color: var(--blood-red);
    padding: 2px 10px; border: 1px solid rgba(178,0,0,0.4);
    font-size: 0.8rem;
}

/* Pwndbg Sections */
.pwndbg-section {
    background: #0a0a0a; border: 1px solid #222;
    padding: 25px; margin-bottom: 30px; position: relative;
    overflow: hidden;
}
.pwndbg-title {
    color: var(--blood-red); font-weight: bold;
    margin-bottom: 15px; display: flex; align-items: center;
    font-size: 1rem; gap: 10px;
}
.pwndbg-title::before, .pwndbg-title::after {
    content: ''; flex-grow: 1; height: 1px; background: #333;
}

.code-block {
    background: #030303; border-left: 4px solid var(--blood-red);
    padding: 20px; overflow-x: auto;
    font-size: 0.9rem; line-height: 1.6; color: #a0aec0;
    margin: 15px 0;
}
.code-block .comment { color: #555; }
.code-block .func-name { color: var(--amber); }
.code-block .addr { color: var(--gdb-blue); }
.code-block .reg { color: var(--gdb-green); font-weight: bold; }
.code-block .blood { color: var(--blood-red); font-weight: bold; }

/* Writeup rendered markdown */
.writeup-content h1, .writeup-content h2, .writeup-content h3 {
    color: #fff; margin: 25px 0 15px;
}
.writeup-content h1 { font-size: 1.8rem; border-bottom: 1px solid #333; padding-bottom: 10px; }
.writeup-content h2 { font-size: 1.4rem; color: var(--blood-red); }
.writeup-content h3 { font-size: 1.2rem; color: var(--amber); }
.writeup-content p {
    color: #ccc; line-height: 1.7; margin-bottom: 15px;
}
.writeup-content code {
    background: #111; padding: 2px 6px; color: var(--gdb-green);
    border-radius: 3px; font-size: 0.9em;
}
.writeup-content pre {
    background: #030303; border-left: 4px solid var(--blood-red);
    padding: 20px; overflow-x: auto; margin: 15px 0;
    line-height: 1.5;
}
.writeup-content pre code {
    background: none; padding: 0; color: #a0aec0;
}
.writeup-content ul, .writeup-content ol {
    margin: 10px 0 15px 25px; color: #ccc;
}
.writeup-content li { margin-bottom: 5px; line-height: 1.6; }
.writeup-content strong { color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: #222; }
::-webkit-scrollbar-thumb:hover { background: var(--blood-red); }

@media (max-width: 600px) {
    h1 { font-size: 2.5rem; }
    .stats-bar { gap: 20px; }
    .stat-number { font-size: 2rem; }
    .chall-header h1 { font-size: 2rem; }
}

/* ===== Kamui Transition ===== */
.kamui-overlay {
    position: fixed;
    top: 50%; left: 50%;
    width: 250vw; height: 250vh;
    background: radial-gradient(circle at center, #000 30%, #050505 70%, transparent 100%);
    z-index: 10005;
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0) rotate(0deg);
    transition: none;
    border-radius: 50%;
}
.kamui-overlay.kamui-active {
    animation: kamuiSuck 1.2s cubic-bezier(0.5, 0, 0.1, 1) forwards;
}

@keyframes kamuiSuck {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0) rotate(0deg);
        filter: blur(20px);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0.5) rotate(360deg);
        filter: blur(5px);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1) rotate(720deg);
        filter: blur(0px);
    }
}

body.kamui-sucking .container {
    animation: kamuiPageSuck 1.2s cubic-bezier(0.5, 0, 0.1, 1) forwards;
}
@keyframes kamuiPageSuck {
    0% { transform: scale(1) rotate(0); filter: blur(0); opacity: 1; }
    100% { transform: scale(0) rotate(-360deg); filter: blur(20px); opacity: 0; }
}

/* ===== Amaterasu Opening Transition ===== */
.amaterasu-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: #000;
    z-index: 10006;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.amaterasu-overlay::before {
    content: '';
    position: absolute;
    width: 150vw; height: 150vh;
    background: radial-gradient(circle at center, transparent 0%, #000 40%, #1a0000 80%, #b20000 100%);
    filter: blur(20px) contrast(3);
    mix-blend-mode: screen;
    animation: blackFlamePulse 0.5s infinite alternate;
}

.amaterasu-overlay.burn-away {
    animation: amaterasuBurn 1.5s cubic-bezier(0.7, 0, 0.3, 1) forwards;
}

@keyframes blackFlamePulse {
    0% { transform: scale(1) rotate(0deg); opacity: 1; }
    100% { transform: scale(1.05) rotate(2deg); opacity: 0.9; }
}

@keyframes amaterasuBurn {
    0% {
        opacity: 1;
        clip-path: circle(100% at 50% 50%);
        filter: blur(0px);
    }
    50% {
        opacity: 1;
        filter: blur(10px);
    }
    100% {
        opacity: 0;
        clip-path: circle(0% at 50% 50%);
        filter: blur(20px);
    }
}