@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600&family=Syne:wght@400;500;700&display=swap');

:root {
    --theme-color: #78909c;
    --theme-glow: rgba(120, 144, 156, 0.15);

    --bg: #f7f6f3;
    --bg-surface: #ffffff;
    --bg-raised: #f0ede8;
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --text-muted: #aaa;
    --border: rgba(0,0,0,0.08);
    --border-strong: rgba(0,0,0,0.15);
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-raised: 0 2px 8px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.06);
    --radius: 6px;
    --radius-lg: 10px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Syne', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
    -webkit-font-smoothing: antialiased;
}

/* ── Header Controls ── */
.header-left-controls {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1000;
    display: flex;
    gap: 8px;
}

#burger-menu, #settings-btn, #exit-btn {
    cursor: pointer;
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    padding: 8px 14px;
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    letter-spacing: 0.02em;
    border-radius: var(--radius);
    transition: background 0.15s, border-color 0.15s, transform 0.1s, color 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--shadow);
}

#burger-menu:hover, #settings-btn:hover {
    background: var(--theme-color);
    border-color: var(--theme-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-raised);
}

#exit-btn:hover {
    background: #e53935;
    border-color: #e53935;
    color: white;
    transform: translateY(-1px);
}

#exit-btn:active, #burger-menu:active, #settings-btn:active {
    transform: translateY(0);
}

/* ── Terminal Trigger Button ── */
.terminal-trigger {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1000;
    background: #1a1a1a;
    color: #27c93f;
    border: 1px solid rgba(39, 201, 63, 0.3);
    padding: 8px 16px;
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    letter-spacing: 0.03em;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 0 0 0 rgba(39, 201, 63, 0);
}

.terminal-trigger:hover {
    background: #111;
    border-color: #27c93f;
    box-shadow: 0 0 16px rgba(39, 201, 63, 0.2), var(--shadow-raised);
}

.terminal-trigger::before {
    content: '';
    width: 7px;
    height: 7px;
    background: #27c93f;
    border-radius: 50%;
    display: inline-block;
    animation: blink 1.4s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ── Side Nav ── */
#side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 240px;
    height: 100vh;
    background-color: #161616;
    color: white;
    padding: 72px 0 20px;
    z-index: 999;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255,255,255,0.06);
}

#side-nav.hidden {
    transform: translateX(-100%);
}

#side-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

#side-nav ul::-webkit-scrollbar {
    width: 3px;
}
#side-nav ul::-webkit-scrollbar-track { background: transparent; }
#side-nav ul::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.lang-select {
    padding: 11px 24px;
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    transition: all 0.15s;
    border-left: 2px solid transparent;
    position: relative;
}

.lang-select:hover {
    color: white;
    border-left-color: var(--theme-color);
    background: rgba(255,255,255,0.04);
    padding-left: 28px;
}

.side-nav-footer {
    margin: 12px 20px 0;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.07);
    text-align: center;
}

.side-nav-footer a {
    color: rgba(255,255,255,0.35);
    text-decoration: none;
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.04em;
    transition: color 0.2s;
}

.side-nav-footer a:hover {
    color: var(--theme-color);
}

/* ── Main Content ── */
main {
    padding: 90px 40px 40px;
    max-width: 960px;
    margin: 0 auto;
}

#main-logo {
    max-width: 280px;
    display: block;
    margin: 0 auto 28px auto;
    transition: all 0.3s ease;
    opacity: 0.9;
}

#active-lang {
    color: var(--theme-color);
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 0 24px;
    opacity: 0.85;
}

#search-bar {
    display: block;
    margin: 0 auto 32px auto;
    width: 100%;
    max-width: 480px;
    padding: 11px 18px;
    font-size: 14px;
    font-family: 'JetBrains Mono', monospace;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-primary);
    transition: all 0.2s;
    box-shadow: var(--shadow);
}

#search-bar::placeholder {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 0.03em;
}

#search-bar:disabled, #search-bar[readonly] {
    background: var(--bg-raised);
    border: 1px dashed var(--border-strong);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.6;
    pointer-events: none;
}

#search-bar:not(:disabled):focus {
    outline: none;
    border-color: var(--theme-color);
    box-shadow: 0 0 0 3px var(--theme-glow), var(--shadow);
}

/* ── Cards ── */
#container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.card {
    background: var(--bg-surface);
    padding: 18px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--theme-color);
    opacity: 0;
    transition: opacity 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-raised);
    border-color: rgba(0,0,0,0.12);
}

.card:hover::before {
    opacity: 1;
}

.card h3 {
    margin: 0 0 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
    font-family: 'Syne', sans-serif;
}

.code-snippet {
    display: block;
    background: #1a1a1a;
    color: #e8e8e8;
    padding: 10px 14px;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 1.6;
    margin-top: 4px;
    transition: background 0.15s, color 0.15s;
    word-break: break-all;
    position: relative;
}

.code-snippet:hover {
    background: #111;
    color: var(--theme-color);
}

.code-snippet::after {
    content: 'copy';
    position: absolute;
    top: 8px;
    right: 10px;
    font-size: 10px;
    color: rgba(255,255,255,0.25);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-family: 'JetBrains Mono', monospace;
    transition: color 0.15s;
}

.code-snippet:hover::after {
    color: var(--theme-color);
}

.test-btn {
    margin-top: 10px;
    background: transparent;
    color: var(--theme-color);
    border: 1px solid currentColor;
    padding: 6px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: all 0.15s;
    opacity: 0.7;
}

.test-btn:hover {
    background: var(--theme-color);
    color: white;
    opacity: 1;
    border-color: var(--theme-color);
}

/* ── Settings Modal ── */
.settings-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.settings-overlay.hidden {
    display: none;
}

.settings-window {
    width: 90%;
    max-width: 380px;
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: 0 24px 64px rgba(0,0,0,0.18);
    overflow: hidden;
    animation: slideUp 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideUp {
    from { transform: translateY(16px) scale(0.97); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

@keyframes scaleUp {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
}

.settings-header h2 {
    margin: 0;
    font-size: 14px;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
}

.close-settings {
    background: none;
    border: none;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}

.close-settings:hover {
    background: #ff5f5620;
    color: #ff5f56;
}

.settings-body {
    padding: 8px 0;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background 0.1s;
}

.setting-item:hover {
    background: var(--bg-raised);
}

.setting-item span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-item span i {
    color: var(--theme-color);
    font-size: 15px;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--bg-raised);
    border: 1px solid var(--border-strong);
    transition: 0.25s;
    border-radius: 22px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-muted);
    transition: 0.25s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--theme-color);
    border-color: var(--theme-color);
}

input:checked + .slider:before {
    transform: translateX(18px);
    background-color: white;
}

#volume-slider {
    accent-color: var(--theme-color);
    cursor: pointer;
    width: 100px;
    height: 4px;
}

/* ── Terminal Modal ── */
.terminal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.terminal-overlay.hidden {
    display: none;
}

.terminal-window {
    width: 85%;
    max-width: 860px;
    height: 520px;
    background: #0f0f0f;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 40px 80px rgba(0,0,0,0.6), 0 0 0 0.5px rgba(255,255,255,0.04);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: scaleUp 0.25s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.terminal-header {
    background: #171717;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    gap: 12px;
}

.terminal-controls {
    display: flex;
    gap: 7px;
    align-items: center;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: filter 0.15s;
}

.dot:hover { filter: brightness(1.3); }

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

.terminal-title {
    flex: 1;
    text-align: center;
    color: rgba(255,255,255,0.3);
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.06em;
    margin-right: 52px;
}

#terminal-body {
    flex: 1;
    padding: 20px 24px;
    overflow-y: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    display: flex;
    flex-direction: column;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

#terminal-body::-webkit-scrollbar { width: 4px; }
#terminal-body::-webkit-scrollbar-track { background: transparent; }
#terminal-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

#terminal-output {
    flex: 1;
    margin-bottom: 12px;
}

.term-line {
    margin-bottom: 4px;
    line-height: 1.6;
    color: #c8c8c8;
}

.term-line.system {
    color: rgba(255,255,255,0.25);
    font-style: italic;
}

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: 10px;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 12px;
}

.prompt {
    color: #27c93f;
    font-weight: 600;
    font-size: 14px;
}

#term-input {
    flex: 1;
    background: transparent;
    border: none;
    color: #f0f0f0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    outline: none;
    caret-color: #27c93f;
    letter-spacing: 0.02em;
}

/* ── Dark Theme ── */
body.dark-theme {
    --bg: #111111;
    --bg-surface: #1a1a1a;
    --bg-raised: #222222;
    --text-primary: #f0f0f0;
    --text-secondary: #999;
    --text-muted: #555;
    --border: rgba(255,255,255,0.07);
    --border-strong: rgba(255,255,255,0.12);
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.2);
    --shadow-raised: 0 4px 12px rgba(0,0,0,0.4), 0 12px 32px rgba(0,0,0,0.3);
}

body.dark-theme #main-logo {
    background: rgba(255,255,255,0.06);
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.08);
}

body.dark-theme .code-snippet {
    background: #0d0d0d;
}

body.dark-theme .code-snippet:hover {
    background: #080808;
}

body.dark-theme .settings-window {
    box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}

body.dark-theme #search-bar:disabled,
body.dark-theme #search-bar[readonly] {
    background: var(--bg-raised);
    border-color: rgba(255,255,255,0.08);
    color: var(--text-muted);
    opacity: 0.7;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    main { padding: 80px 16px 24px; }
    #container { grid-template-columns: 1fr; }
    .terminal-window { width: 95%; height: 460px; }
    .settings-window { width: 95%; }
}