@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400..800&family=JetBrains+Mono:wght@100..800&display=swap');

:root {
    /* Color Palette - Neon Industrial */
    --bg-base: #050505;
    --bg-surface: #0f0f11;
    --bg-surface-hover: #1a1a1d;
    --border: #2a2a30;
    --border-light: #3f3f46;
    
    --fg-primary: #f4f4f5;
    --fg-muted: #a1a1aa;
    
    --accent: #ccff00; /* Neon Lime */
    --accent-hover: #b3e600;
    --danger: #ff0055;
    --danger-bg: rgba(255, 0, 85, 0.1);
    --success: #00ffaa;
    --success-bg: rgba(0, 255, 170, 0.1);

    /* Typography */
    --font-head: 'Bricolage Grotesque', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Metrics */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 0px; /* Brutalist = sharp corners */
    --grid-gap: 20px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-mono);
    background-color: var(--bg-base);
    color: var(--fg-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    /* subtle grid background */
    background-image: linear-gradient(var(--border) 1px, transparent 1px),
                      linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center center;
}

/* Grain Noise Overlay */
.noise {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    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");
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
    z-index: 10;
}

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4 {
    font-family: var(--font-head);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 { font-size: 2rem; }
h3 { font-size: 1.2rem; }

.sys-text {
    font-family: var(--font-mono);
    color: var(--fg-muted);
    font-size: 0.85rem;
}

/* --- ANIMATIONS --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}
.blink {
    animation: blink 1.5s infinite;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* --- HEADER --- */
.sys-header {
    border: 1px solid var(--accent);
    background: var(--bg-surface);
    margin-bottom: 2rem;
    position: relative;
}

.sys-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sys-logo i {
    font-size: 2rem;
    color: var(--accent);
}

.sys-logo h1 {
    font-size: 1.5rem;
    color: var(--accent);
    margin: 0;
}

.sys-marquee {
    overflow: hidden;
    white-space: nowrap;
    background: var(--accent);
    color: var(--bg-base);
    padding: 0.25rem 0;
    font-weight: 700;
    font-size: 0.85rem;
}

.marquee-content {
    display: inline-flex;
    gap: 2rem;
    animation: marquee 10s linear infinite;
    width: max-content;
}

/* --- COMPONENTS --- */
.btn {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    padding: 0.75rem 1.5rem;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
}

.btn.primary {
    background: var(--accent);
    color: var(--bg-base);
    box-shadow: 4px 4px 0px var(--border-light);
}

.btn.primary:hover:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--border-light);
    background: var(--accent-hover);
}

.btn.primary:disabled {
    background: var(--border);
    color: var(--fg-muted);
    box-shadow: none;
    cursor: not-allowed;
}

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

.btn.secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--accent);
    color: var(--accent);
}

.btn.text-only {
    background: transparent;
    color: var(--fg-muted);
    padding: 0.5rem;
}
.btn.text-only:hover {
    color: var(--accent);
}

.btn.text-only.alert:hover {
    color: var(--danger);
}

.btn.small {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.btn.huge {
    width: 100%;
    padding: 1.25rem;
    font-size: 1.1rem;
    justify-content: center;
}

/* --- VIEWS --- */
.view {
    display: none;
    flex-direction: column;
    flex: 1;
}

.view.active {
    display: flex;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.status-dot {
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
}

/* --- DASHBOARD --- */
.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--grid-gap);
    padding-bottom: 3rem;
}

.sys-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 1.5rem;
    position: relative;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
}

.sys-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.sys-card:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.sys-card:hover::before {
    width: 100%;
}

.card-icon {
    font-size: 2.5rem;
    color: var(--fg-muted);
    margin-bottom: 1rem;
}

.sys-card:hover .card-icon {
    color: var(--accent);
}

.sys-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.card-meta {
    font-size: 0.8rem;
    color: var(--fg-muted);
    margin-top: auto;
    border-top: 1px dashed var(--border);
    padding-top: 0.5rem;
}

.btn-icon-danger {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    color: var(--fg-muted);
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
    transition: color 0.2s;
}

.btn-icon-danger:hover {
    color: var(--danger);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    border: 1px dashed var(--border-light);
    color: var(--fg-muted);
    background: var(--bg-surface);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* --- SUBJECT VIEW --- */
.panel-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--grid-gap);
}

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 1.5rem;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
}

.list-container {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Custom Scrollbar */
.list-container::-webkit-scrollbar { width: 6px; }
.list-container::-webkit-scrollbar-track { background: var(--bg-base); }
.list-container::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 10px; }

.file-row {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--bg-base);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
    gap: 1rem;
}

.file-row:hover {
    border-color: var(--border-light);
}

.file-row.selected {
    border-color: var(--accent);
    background: rgba(204, 255, 0, 0.05);
}

.sys-checkbox {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
}

.sys-checkbox:checked {
    background: var(--accent);
    border-color: var(--accent);
}
.sys-checkbox:checked::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 10px;
    border: solid var(--bg-base);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    top: 1px;
    left: 6px;
}

.file-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.file-info strong {
    font-size: 0.95rem;
}

.file-info span {
    font-size: 0.75rem;
    color: var(--fg-muted);
}

/* Config Panel */
.form-group {
    margin-top: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--fg-muted);
}

.grid-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.option-btn {
    background: var(--bg-base);
    border: 1px solid var(--border);
    color: var(--fg-primary);
    padding: 0.75rem;
    cursor: pointer;
    font-family: var(--font-mono);
    font-weight: 700;
    transition: all 0.2s;
}

.option-btn:hover {
    border-color: var(--border-light);
    background: var(--bg-surface-hover);
}

.option-btn.active {
    background: var(--accent);
    color: var(--bg-base);
    border-color: var(--accent);
}

.segmented-control {
    display: flex;
    border: 1px solid var(--border);
    background: var(--bg-base);
}

.segment {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--fg-muted);
    padding: 0.75rem;
    cursor: pointer;
    font-family: var(--font-mono);
    font-weight: 700;
    transition: all 0.2s;
}

.segment.active {
    background: var(--fg-primary);
    color: var(--bg-base);
}

.spacer {
    margin-top: 2rem;
}

/* --- QUIZ VIEW --- */
.hud-top {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--bg-surface);
    padding: 1rem;
    border: 1px solid var(--border);
}

.hud-progress-container {
    flex: 1;
    height: 4px;
    background: var(--bg-base);
    position: relative;
}

.hud-progress-bar {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px var(--accent);
}

.hud-counter {
    font-weight: 700;
    color: var(--accent);
}

.quiz-canvas {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 3rem;
    position: relative;
}

.quiz-canvas::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        linear-gradient(90deg, var(--bg-base) 21px, transparent 1%) center,
        linear-gradient(var(--bg-base) 21px, transparent 1%) center,
        var(--border-light);
    background-size: 22px 22px;
    opacity: 0.1;
    pointer-events: none;
}

.q-badge {
    display: inline-block;
    background: var(--fg-primary);
    color: var(--bg-base);
    padding: 2px 8px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.q-text {
    font-family: var(--font-head);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    line-height: 1.4;
    text-transform: none;
    position: relative;
    z-index: 2;
}

.opts-grid {
    display: grid;
    gap: 1rem;
    position: relative;
    z-index: 2;
}

.opts-grid.cols-2 {
    grid-template-columns: 1fr 1fr;
}

.opt-box {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-base);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.opt-box::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: transparent;
    transition: background 0.2s;
}

.opt-box:hover {
    border-color: var(--border-light);
    background: var(--bg-surface-hover);
}

.opt-idx {
    width: 24px;
    color: var(--fg-muted);
    font-weight: 700;
    margin-right: 1rem;
}

.opt-txt {
    font-size: 1.05rem;
}

.opt-box.selected {
    border-color: var(--fg-primary);
    background: var(--bg-surface-hover);
}
.opt-box.selected::before {
    background: var(--fg-primary);
}
.opt-box.selected .opt-idx {
    color: var(--fg-primary);
}

.opt-box.correct {
    border-color: var(--success);
    background: var(--success-bg);
}
.opt-box.correct::before { background: var(--success); }
.opt-box.correct .opt-idx { color: var(--success); }

.opt-box.incorrect {
    border-color: var(--danger);
    background: var(--danger-bg);
}
.opt-box.incorrect::before { background: var(--danger); }
.opt-box.incorrect .opt-idx { color: var(--danger); }

.feedback-alert {
    margin-top: 2rem;
    padding: 2rem;
    border: 1px solid var(--border);
    border-left: 6px solid var(--border);
    background: var(--bg-surface);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    position: relative;
    z-index: 2;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
    overflow: hidden;
}

.feedback-alert::after {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
    animation: scanline 2s infinite;
}

@keyframes scanline {
    100% { left: 200%; }
}

.feedback-alert i { font-size: 2rem; }
.feedback-alert .feedback-content { flex: 1; }
.feedback-alert strong { display: block; margin-bottom: 0.75rem; font-family: var(--font-head); font-size: 1.4rem; text-transform: uppercase; letter-spacing: 1px;}
.feedback-alert p { 
    color: var(--fg-muted); 
    font-size: 1rem; 
    line-height: 1.6;
    position: relative;
    padding-left: 1rem;
    border-left: 2px dashed var(--border-light);
    font-style: italic;
}

.feedback-alert.correct { border-color: var(--success); color: var(--success); border-left-color: var(--success); }
.feedback-alert.correct p { color: var(--fg-primary); border-left-color: var(--success); }
.feedback-alert.correct::before {
    content: 'CITACIÓN_APROBADA //';
    position: absolute;
    top: 5px; right: 10px;
    font-size: 0.6rem;
    opacity: 0.5;
}

.feedback-alert.incorrect { border-color: var(--danger); color: var(--danger); border-left-color: var(--danger); }
.feedback-alert.incorrect p { color: var(--fg-primary); border-left-color: var(--danger); }
.feedback-alert.incorrect::before {
    content: 'CITACIÓN_RECHAZADA //';
    position: absolute;
    top: 5px; right: 10px;
    font-size: 0.6rem;
    opacity: 0.5;
}

.hud-bottom {
    margin-top: 1.5rem;
    display: flex;
    justify-content: flex-end;
}

.hidden { display: none !important; }

/* --- STUDY MODE --- */
.study-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.study-item {
    background: var(--bg-base);
    border: 1px solid var(--border);
    padding: 2rem;
    position: relative;
}

.study-badge {
    position: absolute;
    top: -1px; right: -1px;
    padding: 0.25rem 1rem;
    background: var(--fg-primary);
    color: var(--bg-base);
    font-size: 0.75rem;
    font-weight: 700;
}

.study-q {
    font-family: var(--font-head);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    padding-right: 80px;
    text-transform: none;
}

.study-ans {
    border-left: 2px solid var(--success);
    padding-left: 1rem;
    margin-bottom: 1.5rem;
}
.study-ans-lbl { color: var(--success); font-size: 0.8rem; margin-bottom: 0.5rem; display: block; font-weight: 700;}

.study-expl {
    background: var(--bg-surface);
    padding: 1rem;
    border: 1px dashed var(--border-light);
    font-size: 0.9rem;
    color: var(--fg-muted);
}

/* --- RESULTS --- */
.results-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
}

.results-visual {
    position: relative;
    width: 200px;
    height: 200px;
    margin-bottom: 2rem;
}

.tech-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.ring-bg, .ring-progress {
    fill: none;
    stroke-width: 4;
}

.ring-bg { stroke: var(--border); }
.ring-progress {
    stroke: var(--accent);
    stroke-dasharray: 283; /* 2 * PI * 45 */
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1s ease-out;
}

.results-score-text {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-head);
    font-size: 3rem;
    color: var(--fg-primary);
}

.result-title {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.results-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
}

/* --- TOAST --- */
.sys-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--fg-primary);
    color: var(--bg-base);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.sys-toast.error {
    background: var(--danger);
    color: #fff;
}

.sys-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .panel-layout { grid-template-columns: 1fr; }
    .grid-options { grid-template-columns: 1fr 1fr; }
    .opts-grid.cols-2 { grid-template-columns: 1fr; }
    .results-actions { flex-direction: column; }
    .app-container { padding: 1rem; }
    .quiz-canvas { padding: 1.5rem; }
    .sys-logo h1 { font-size: 1.2rem; }
}

/* --- CODE BLOCKS (Markdown) --- */
pre {
    background: #000000 !important;
    border: 1px dashed var(--border-light);
    padding: 1.5rem !important;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-family: var(--font-mono) !important;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.8);
}
code {
    font-family: var(--font-mono) !important;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    color: var(--accent);
}
pre code {
    background: transparent;
    padding: 0;
    color: inherit;
    box-shadow: none;
}
.q-text p, .opt-txt p, .feedback-body p {
    margin: 0;
}
.q-text p + p, .feedback-body p + p {
    margin-top: 1rem;
}