/* ============================================================
   ЗКЭ-4-10 — Кодовый замок СССР
   Стили: советский промышленный ретро-футуризм
   ============================================================ */

/* ---------- Переменные ---------- */
:root {
    /* Фон и панели */
    --bg-deep:        #0d0f11;
    --bg-panel:       #1a1d22;
    --bg-panel-2:     #22262c;
    --bg-inset:       #0e1114;
    --border-metal:   #3a4048;
    --border-light:   #4d545e;

    /* Текст */
    --text-primary:   #d8dde3;
    --text-secondary: #8a929c;
    --text-dim:       #5a616a;

    /* Акценты */
    --accent-amber:   #ffb627;
    --accent-amber-2: #ff8c00;
    --accent-red:     #e63946;
    --accent-green:   #4ade80;
    --accent-cyan:    #4fc3f7;
    --accent-gold:    #c9a227;

    /* Металл */
    --metal-1:        #8b8b8b;
    --metal-2:        #c9c9c9;
    --metal-3:        #6b6b6b;

    /* Тени и свечения */
    --glow-amber:     0 0 12px rgba(255, 182, 39, 0.7);
    --glow-red:       0 0 12px rgba(230, 57, 70, 0.7);
    --glow-green:     0 0 12px rgba(74, 222, 128, 0.7);
    --glow-cyan:      0 0 10px rgba(79, 195, 247, 0.6);

    --shadow-panel:   0 4px 20px rgba(0, 0, 0, 0.6);
    --shadow-inset:   inset 0 1px 3px rgba(0, 0, 0, 0.8);
    --shadow-key:     0 3px 0 #0a0c0e, 0 4px 8px rgba(0, 0, 0, 0.5);
    --shadow-key-act: 0 1px 0 #0a0c0e, 0 2px 4px rgba(0, 0, 0, 0.5);

    /* Шрифты */
    --font-serif:     'PT Serif', Georgia, serif;
    --font-slab:      'Roboto Slab', 'PT Serif', serif;
    --font-mono:      'Share Tech Mono', 'Courier New', monospace;

    /* Прочее */
    --radius:         8px;
    --radius-sm:      4px;
    --transition:     0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Сброс и база ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-slab);
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-deep);
    background-image:
        radial-gradient(circle at 20% 10%, rgba(79, 195, 247, 0.05), transparent 40%),
        radial-gradient(circle at 80% 90%, rgba(255, 182, 39, 0.05), transparent 40%),
        repeating-linear-gradient(0deg, rgba(255,255,255,0.012) 0 1px, transparent 1px 3px),
        repeating-linear-gradient(90deg, rgba(255,255,255,0.012) 0 1px, transparent 1px 3px);
    min-height: 100vh;
    overflow-x: hidden;
}

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

h1, h2, h3 {
    font-family: var(--font-slab);
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* Кастомный скроллбар */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-inset); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #3a4048, #262b31);
    border-radius: 6px;
    border: 2px solid var(--bg-inset);
}
::-webkit-scrollbar-thumb:hover { background: #4d545e; }

/* ---------- Шапка ---------- */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(180deg, #1f242a 0%, #15181c 100%);
    border-bottom: 2px solid var(--border-metal);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.header-title h1 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent-amber);
    text-shadow: 0 0 12px rgba(255, 182, 39, 0.4);
    font-family: var(--font-mono);
}

.header-title .subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-top: 2px;
}

.header-nav {
    display: flex;
    gap: 8px;
}

.nav-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: linear-gradient(180deg, #2c323a, #1e2227);
    border: 1px solid var(--border-metal);
    color: var(--text-secondary);
    font-size: 18px;
    display: grid;
    place-items: center;
    transition: var(--transition);
    box-shadow: 0 2px 0 rgba(0,0,0,0.5);
}

.nav-btn:hover {
    color: var(--accent-amber);
    border-color: var(--accent-amber);
    box-shadow: 0 2px 0 rgba(0,0,0,0.5), 0 0 12px rgba(255, 182, 39, 0.35);
    transform: translateY(-1px);
}

.nav-btn:active {
    transform: translateY(1px);
    box-shadow: 0 0 0 rgba(0,0,0,0.5);
}

.nav-btn.muted { color: var(--text-dim); opacity: 0.6; }

/* Полоса прогресса */
.progress-line {
    height: 3px;
    background: var(--bg-inset);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-amber), var(--accent-amber-2));
    box-shadow: 0 0 8px var(--accent-amber);
    transition: width 0.5s ease-out;
}

/* ---------- Основной макет ---------- */
.app-main {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px 24px 10px;
    display: grid;
    grid-template-columns: minmax(280px, 1fr) minmax(420px, 1.7fr);
    grid-template-rows: auto auto;
    grid-template-areas:
        "lock circuit"
        "lock keyboard";
    gap: 20px;
}

.panel-lock     { grid-area: lock;     }
.panel-circuit  { grid-area: circuit;  }
.panel-keyboard { grid-area: keyboard; }

/* ---------- Панель (общая) ---------- */
.panel {
    background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-panel-2) 100%);
    border: 1px solid var(--border-metal);
    border-radius: var(--radius);
    box-shadow: var(--shadow-panel);
    padding: 16px;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    pointer-events: none;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 25%, transparent 75%, rgba(0,0,0,0.15) 100%);
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 12px;
    margin-bottom: 14px;
    border-bottom: 1px solid var(--border-metal);
}

.panel-tag {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-amber);
    background: rgba(255, 182, 39, 0.1);
    border: 1px solid rgba(255, 182, 39, 0.3);
    padding: 2px 8px;
    border-radius: 3px;
    letter-spacing: 0.1em;
}

.panel-header h2 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.04em;
    flex: 1;
}

/* ============================================================
   ЛЕВАЯ ПАНЕЛЬ: ЗАЩЁЛКА
   ============================================================ */
.panel-lock {
    grid-row: span 2;
}

.lock-scene {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    background: radial-gradient(ellipse at center, rgba(79, 195, 247, 0.04), transparent 60%);
    border-radius: var(--radius-sm);
    padding: 10px;
    min-height: 380px;
}

#lock-svg {
    width: 100%;
    max-width: 340px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.6));
}

/* Анимация ригеля */
#bolt-group {
    transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.panel-lock.unlocked #bolt-group {
    transform: translateX(95px);
}

.panel-lock.unlocked #spring-group {
    transform: translateX(70px) scaleX(0.5);
    transform-origin: left center;
    transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#spring-group { transition: transform 0.55s ease-out; }

/* Свечение электромагнита */
#magnet-glow {
    transition: opacity 0.25s ease-in-out;
}

.panel-lock.magnet-on #magnet-glow {
    opacity: 1;
    animation: magnetPulse 1.2s ease-in-out infinite;
}

@keyframes magnetPulse {
    0%, 100% { opacity: 0.7; }
    50%      { opacity: 1; }
}

/* Индикатор состояния замка */
.lock-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--bg-inset);
    border: 1px solid var(--border-metal);
    border-radius: var(--radius-sm);
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-inset);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-red);
    box-shadow: 0 0 8px var(--accent-red);
    transition: var(--transition);
    animation: statusBlink 2s infinite;
}

@keyframes statusBlink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.55; }
}

.lock-status.open .status-dot {
    background: var(--accent-green);
    box-shadow: 0 0 10px var(--accent-green);
    animation: none;
}

.lock-status.open .status-text { color: var(--accent-green); }

.lock-status.error .status-dot {
    background: var(--accent-red);
    box-shadow: 0 0 14px var(--accent-red);
    animation: errBlink 0.35s 3;
}

@keyframes errBlink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.15; }
}

.lock-info {
    margin-top: 14px;
    padding: 12px;
    background: var(--bg-inset);
    border-left: 3px solid var(--accent-amber);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.55;
}

.lock-info strong { color: var(--accent-amber); }

/* ============================================================
   ПРАВАЯ ВЕРХНЯЯ ПАНЕЛЬ: СХЕМА
   ============================================================ */
.panel-circuit {
    min-height: 340px;
}

.circuit-legend {
    display: flex;
    gap: 14px;
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 0.03em;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    display: inline-block;
    border: 1px solid #000;
}

.dot-off { background: #3a4048; }
.dot-on  { background: var(--accent-cyan); box-shadow: 0 0 6px var(--accent-cyan); }

.circuit-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 0;
}

#circuit-svg {
    width: 100%;
    height: auto;
    max-height: 340px;
    border-radius: var(--radius-sm);
    background: #0a0f13;
    box-shadow: var(--shadow-inset);
}

/* Кликабельные узлы схемы */
.circuit-node {
    cursor: pointer;
    transition: filter 0.2s ease;
}

.circuit-node:hover {
    filter: drop-shadow(0 0 8px rgba(255, 182, 39, 0.8));
}

.circuit-node.active rect,
.circuit-node.active circle,
.circuit-node.active polygon {
    stroke: var(--accent-cyan);
    filter: drop-shadow(0 0 6px var(--accent-cyan));
}

.circuit-node.active text {
    fill: var(--accent-cyan);
    font-weight: 700;
}

.circuit-node.pulse rect {
    animation: nodePulse 0.6s ease-in-out;
}

@keyframes nodePulse {
    0%   { stroke: #4fc3f7; filter: drop-shadow(0 0 4px #4fc3f7); }
    50%  { stroke: #fff;   filter: drop-shadow(0 0 16px #4fc3f7); }
    100% { stroke: #4fc3f7; filter: drop-shadow(0 0 4px #4fc3f7); }
}

.circuit-node.error rect {
    animation: nodeError 0.35s ease-in-out 3;
}

@keyframes nodeError {
    0%, 100% { stroke: #3a5050; }
    50%      { stroke: #e63946; filter: drop-shadow(0 0 10px #e63946); }
}

/* Инфо-окно о схеме */
.circuit-info {
    background: var(--bg-inset);
    border: 1px solid var(--border-metal);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    min-height: 52px;
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-inset);
    transition: var(--transition);
}

.circuit-info.active {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
}

.circuit-info strong { color: var(--accent-amber); }
.circuit-info-hint { color: var(--text-dim); font-style: italic; }

/* ============================================================
   ПРАВАЯ НИЖНЯЯ ПАНЕЛЬ: КЛАВИАТУРА
   ============================================================ */
.panel-keyboard {
    min-height: 300px;
}

.kbd-indicators {
    display: flex;
    gap: 8px;
}

.kbd-ind {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-amber);
    background: var(--bg-inset);
    border: 1px solid var(--border-metal);
    padding: 3px 10px;
    border-radius: 3px;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-inset);
}

.kbd-ind.error-flash {
    color: var(--accent-red);
    border-color: var(--accent-red);
    animation: errBlink 0.35s 3;
}

/* Корпус клавиатуры */
.keyboard-scene {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.keyboard-device {
    background: linear-gradient(160deg, #2a2f36 0%, #1a1d22 100%);
    border: 2px solid var(--border-metal);
    border-radius: 10px;
    padding: 14px;
    box-shadow:
        0 8px 24px rgba(0,0,0,0.7),
        inset 0 1px 0 rgba(255,255,255,0.08),
        inset 0 -2px 4px rgba(0,0,0,0.6);
    width: 100%;
    max-width: 420px;
}

/* Верхняя часть корпуса */
.kbd-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    padding: 8px 12px;
    background: var(--bg-inset);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-inset);
}

.kbd-lamp {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #5a3030, #2a1515);
    border: 1px solid #1a0a0a;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.8);
    transition: var(--transition);
}

.kbd-lamp.on {
    background: radial-gradient(circle at 30% 30%, #ffdd88, #e63946);
    box-shadow:
        0 0 12px rgba(230, 57, 70, 0.9),
        0 0 24px rgba(230, 57, 70, 0.5),
        inset 0 1px 2px rgba(0,0,0,0.4);
}

.kbd-lamp.success {
    background: radial-gradient(circle at 30% 30%, #bbf7d0, #4ade80);
    box-shadow:
        0 0 14px rgba(74, 222, 128, 0.9),
        0 0 28px rgba(74, 222, 128, 0.5);
}

.kbd-brand {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--text-dim);
    text-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

.kbd-led {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 6px #4ade80;
    animation: ledPulse 2.5s infinite;
}

@keyframes ledPulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

/* Сетка кнопок */
.keyboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.key {
    position: relative;
    height: 52px;
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    background: linear-gradient(180deg, #3a4048 0%, #262b31 100%);
    border: 1px solid #1a1d22;
    border-radius: 6px;
    box-shadow:
        0 3px 0 #0a0c0e,
        0 4px 8px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.08);
    transition: transform 0.06s ease-out, box-shadow 0.06s ease-out, background 0.15s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.key:hover:not(:disabled) {
    background: linear-gradient(180deg, #454c56 0%, #2e343b 100%);
    color: var(--accent-amber);
}

.key:active:not(:disabled),
.key.pressed {
    transform: translateY(3px);
    box-shadow:
        0 0 0 #0a0c0e,
        0 1px 3px rgba(0,0,0,0.6),
        inset 0 2px 4px rgba(0,0,0,0.5);
    background: linear-gradient(180deg, #1e2227 0%, #2a2f36 100%);
    color: var(--accent-amber);
}

.key:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.key-disabled,
.key:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    background: linear-gradient(180deg, #262b31 0%, #1a1d22 100%);
    color: var(--text-dim);
}

.key-reset {
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--accent-amber);
    background: linear-gradient(180deg, #4a3a1a 0%, #2e2511 100%);
    border-color: #5a4520;
}

.key-reset:hover:not(:disabled) {
    background: linear-gradient(180deg, #5a4520 0%, #3a2e15 100%);
    color: #ffd87a;
}

/* Нижняя часть: дисплей кода */
.keyboard-footer {
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.code-display {
    display: flex;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-inset);
    border: 1px solid var(--border-metal);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-inset);
}

.code-cell {
    width: 32px;
    height: 42px;
    display: grid;
    place-items: center;
    font-family: var(--font-mono);
    font-size: 22px;
    color: var(--text-dim);
    background: #050708;
    border: 1px solid #1a1d22;
    border-radius: 3px;
    box-shadow: inset 0 2px 6px rgba(0,0,0,0.9);
    transition: var(--transition);
}

.code-cell.filled {
    color: var(--accent-amber);
    text-shadow: 0 0 8px rgba(255, 182, 39, 0.6);
    border-color: rgba(255, 182, 39, 0.3);
}

.code-cell.error {
    color: var(--accent-red);
    text-shadow: 0 0 8px rgba(230, 57, 70, 0.8);
    border-color: var(--accent-red);
    animation: cellShake 0.35s;
}

.code-cell.success {
    color: var(--accent-green);
    text-shadow: 0 0 8px rgba(74, 222, 128, 0.8);
    border-color: var(--accent-green);
}

@keyframes cellShake {
    0%, 100% { transform: translateX(0); }
    20%      { transform: translateX(-4px); }
    40%      { transform: translateX(4px); }
    60%      { transform: translateX(-3px); }
    80%      { transform: translateX(3px); }
}

.kbd-hint {
    font-size: 12px;
    color: var(--text-dim);
    text-align: center;
    font-style: italic;
}

/* ============================================================
   ПОДВАЛ: ЛОГ И КНОПКИ
   ============================================================ */
.app-footer {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 24px 30px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 20px;
    align-items: start;
}

.log-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-metal);
    border-radius: var(--radius);
    box-shadow: var(--shadow-panel);
    overflow: hidden;
    max-height: 200px;
    display: flex;
    flex-direction: column;
}

.log-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    background: var(--bg-inset);
    border-bottom: 1px solid var(--border-metal);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.log-clear {
    font-size: 10px;
    color: var(--text-dim);
    padding: 3px 8px;
    border-radius: 3px;
    border: 1px solid var(--border-metal);
    transition: var(--transition);
}

.log-clear:hover {
    color: var(--accent-red);
    border-color: var(--accent-red);
}

.log-list {
    list-style: none;
    overflow-y: auto;
    padding: 6px 0;
    flex: 1;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
}

.log-item {
    padding: 3px 14px;
    border-left: 3px solid transparent;
    color: var(--text-secondary);
    animation: logFadeIn 0.3s ease-out;
}

@keyframes logFadeIn {
    from { opacity: 0; transform: translateX(-8px); }
    to   { opacity: 1; transform: translateX(0); }
}

.log-item::before {
    content: '› ';
    color: var(--text-dim);
    margin-right: 4px;
}

.log-info    { border-left-color: var(--accent-cyan);  color: var(--text-secondary); }
.log-success { border-left-color: var(--accent-green); color: var(--accent-green); }
.log-error   { border-left-color: var(--accent-red);   color: var(--accent-red); }
.log-warn    { border-left-color: var(--accent-amber); color: var(--accent-amber); }

/* Кнопки действий */
.footer-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn {
    font-family: var(--font-slab);
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.06em;
    padding: 12px 26px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-metal);
    background: linear-gradient(180deg, #2c323a, #1e2227);
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: 0 3px 0 #0a0c0e, 0 4px 10px rgba(0,0,0,0.5);
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 0 #0a0c0e, 0 6px 14px rgba(0,0,0,0.6);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: 0 0 0 #0a0c0e, 0 1px 4px rgba(0,0,0,0.5);
}

.btn-primary {
    background: linear-gradient(180deg, #4a3810, #2e2511);
    border-color: var(--accent-amber);
    color: var(--accent-amber);
    text-shadow: 0 0 8px rgba(255, 182, 39, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(180deg, #5a4520, #3a2e15);
    box-shadow: 0 5px 0 #0a0c0e, 0 6px 14px rgba(0,0,0,0.6), 0 0 20px rgba(255, 182, 39, 0.4);
}

.btn-quiz {
    font-size: 15px;
    padding: 14px 32px;
}

/* ============================================================
   МОДАЛЬНЫЕ ОКНА
   ============================================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.visible {
    display: flex;
    animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 720px;
    max-height: 88vh;
    overflow-y: auto;
    background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-panel-2) 100%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.9),
        0 0 40px rgba(255, 182, 39, 0.1);
    padding: 28px 32px;
    animation: modalContentIn 0.3s cubic-bezier(0.34, 1.4, 0.64, 1);
}

@keyframes modalContentIn {
    from { transform: translateY(24px) scale(0.96); opacity: 0; }
    to   { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-content-quiz { max-width: 800px; }

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--bg-inset);
    border: 1px solid var(--border-metal);
    color: var(--text-secondary);
    font-size: 15px;
    display: grid;
    place-items: center;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--accent-red);
    border-color: var(--accent-red);
    transform: rotate(90deg);
}

.modal-content h2 {
    font-size: 20px;
    color: var(--accent-amber);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-metal);
    letter-spacing: 0.03em;
}

.modal-body h3 {
    font-size: 15px;
    color: var(--accent-cyan);
    margin: 18px 0 8px;
    letter-spacing: 0.04em;
}

.modal-body p,
.modal-body li {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 8px;
}

.modal-body ul,
.modal-body ol {
    padding-left: 22px;
    margin-bottom: 10px;
}

.modal-body li::marker {
    color: var(--accent-amber);
}

.modal-body strong { color: var(--accent-amber); }

.modal-note {
    margin-top: 18px;
    padding: 10px 14px;
    background: var(--bg-inset);
    border-left: 3px solid var(--accent-cyan);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-style: italic;
}

/* ============================================================
   ТЕСТ
   ============================================================ */
.quiz-header {
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-metal);
}

.quiz-header h2 {
    border: none;
    padding: 0;
    margin-bottom: 6px;
}

.quiz-progress {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 0.1em;
}

.quiz-bar {
    height: 4px;
    background: var(--bg-inset);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 10px;
}

.quiz-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-amber), var(--accent-amber-2));
    transition: width 0.4s ease;
}

.quiz-question {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 18px;
    line-height: 1.5;
}

.quiz-answers {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.quiz-answer {
    text-align: left;
    padding: 14px 18px;
    background: var(--bg-inset);
    border: 1px solid var(--border-metal);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-family: var(--font-slab);
    transition: var(--transition);
    position: relative;
    padding-left: 48px;
}

.quiz-answer::before {
    content: attr(data-letter);
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    display: grid;
    place-items: center;
    background: var(--bg-panel);
    border: 1px solid var(--border-metal);
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
    transition: var(--transition);
}

.quiz-answer:hover:not(:disabled) {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
    transform: translateX(3px);
}

.quiz-answer:hover:not(:disabled)::before {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.quiz-answer.correct {
    background: rgba(74, 222, 128, 0.1);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.quiz-answer.correct::before {
    content: '✓';
    color: var(--accent-green);
    border-color: var(--accent-green);
    background: rgba(74, 222, 128, 0.15);
}

.quiz-answer.wrong {
    background: rgba(230, 57, 70, 0.1);
    border-color: var(--accent-red);
    color: var(--accent-red);
    animation: cellShake 0.35s;
}

.quiz-answer.wrong::before {
    content: '✕';
    color: var(--accent-red);
    border-color: var(--accent-red);
    background: rgba(230, 57, 70, 0.15);
}

.quiz-answer:disabled {
    cursor: default;
}

.quiz-nav {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.quiz-result {
    text-align: center;
    padding: 20px 0;
}

.quiz-result h2 {
    font-size: 26px;
    margin-bottom: 20px;
    border: none;
}

.quiz-score {
    font-family: var(--font-mono);
    font-size: 56px;
    font-weight: 700;
    color: var(--accent-amber);
    text-shadow: 0 0 24px rgba(255, 182, 39, 0.6);
    margin: 20px 0;
    letter-spacing: 0.05em;
}

.quiz-score.good { color: var(--accent-green); text-shadow: 0 0 24px rgba(74, 222, 128, 0.6); }
.quiz-score.bad  { color: var(--accent-red);   text-shadow: 0 0 24px rgba(230, 57, 70, 0.6); }

.quiz-verdict {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.quiz-verdict strong { color: var(--accent-amber); }

/* ============================================================
   ТОСТ
   ============================================================ */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(120%);
    padding: 14px 26px;
    background: linear-gradient(180deg, #2a2f36, #1a1d22);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--accent-amber);
    border-radius: var(--radius-sm);
    box-shadow: 0 12px 30px rgba(0,0,0,0.8);
    font-family: var(--font-slab);
    font-size: 14px;
    color: var(--text-primary);
    z-index: 2000;
    transition: transform 0.35s cubic-bezier(0.34, 1.4, 0.64, 1);
    max-width: 90vw;
    pointer-events: none;
}

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

.toast.success { border-left-color: var(--accent-green); }
.toast.error   { border-left-color: var(--accent-red); }
.toast.info    { border-left-color: var(--accent-cyan); }

/* ============================================================
   АДАПТИВНОСТЬ
   ============================================================ */
@media (max-width: 1100px) {
    .app-main {
        grid-template-columns: 1fr;
        grid-template-areas:
            "lock"
            "circuit"
            "keyboard";
    }
    .panel-lock { grid-row: auto; }
    .app-footer {
        grid-template-columns: 1fr;
    }
    .footer-actions {
        flex-direction: row;
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .header-content { padding: 10px 14px; }
    .header-title h1 { font-size: 20px; }
    .header-title .subtitle { font-size: 10px; }
    .app-main { padding: 14px 12px 6px; gap: 14px; }
    .app-footer { padding: 0 12px 24px; }
    .panel { padding: 12px; }
    .panel-header h2 { font-size: 14px; }
    .key { height: 46px; font-size: 17px; }
    .code-cell { width: 26px; height: 36px; font-size: 18px; }
    .modal-content { padding: 20px 18px; }
    .modal-content h2 { font-size: 17px; }
    .quiz-score { font-size: 42px; }
    .btn-quiz { padding: 12px 20px; font-size: 14px; }
    .circuit-legend { display: none; }
    .nav-btn { width: 36px; height: 36px; font-size: 16px; }
}

@media (max-width: 420px) {
    .kbd-indicators { flex-direction: column; gap: 4px; }
    .kbd-ind { font-size: 10px; padding: 2px 6px; }
    .footer-actions { flex-direction: column; }
    .btn { width: 100%; }
}

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

/* ============================================================
   ПЕЧАТЬ
   ============================================================ */
@media print {
    .app-header, .app-footer, .modal, .toast { display: none !important; }
    body { background: #fff; color: #000; }
    .panel { border: 1px solid #ccc; box-shadow: none; }
}