@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@400;700&display=swap');

:root {
    --color-bg: #0a0f18;
    --color-bg-light: #1c2333;
    --color-primary: #00aaff;
    --color-primary-dim: #0055aa;
    --color-primary-bright: #a1e2ff;
    --color-accent: #ffaa00;
    --color-accent-dim: #aa7700;
    --color-secondary: #00ffcc;
    --color-text: #e0e0e0;
    --color-text-dim: #888888;
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

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

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--color-bg);
    font-family: var(--font-sans);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.terminal {
    width: 100%;
    height: 100vh;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow: hidden;
}

.terminal-header {
    text-align: center;
    padding: 0;
    flex-shrink: 0;
}

.header-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    position: relative;
}

.terminal-header h1 {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--color-primary-bright);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin: 0;
}

.sound-btn {
    position: absolute;
    right: 34px;
    width: auto !important;
    padding: 0 8px !important;
    height: 24px;
    font-size: 0.55em !important;
    font-family: var(--font-mono) !important;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 3px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 0.5;
}

.sound-btn.active {
    opacity: 1;
    border-color: var(--color-secondary) !important;
    color: var(--color-secondary) !important;
}

.help-btn {
    position: absolute;
    right: 0;
    width: 24px !important;
    height: 24px;
    padding: 0 !important;
    font-size: 0.75em !important;
    font-weight: 700;
    border-radius: 50% !important;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.terminal-header p {
    font-size: 0.75em;
    color: var(--color-text-dim);
    font-family: var(--font-mono);
    margin: 2px 0;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 14, 0.85);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--color-bg-light);
    border: 1px solid #2a3449;
    border-radius: 8px;
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid #2a3449;
}

.modal-header h2 {
    font-size: 0.85em;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 2px;
    margin: 0;
}

.modal-close {
    width: 28px !important;
    height: 28px;
    padding: 0 !important;
    font-size: 0.7em !important;
    font-weight: 700;
    border-radius: 4px !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: 16px;
    overflow-y: auto;
    font-size: 0.75em;
    line-height: 1.6;
    color: var(--color-text);
}

.modal-body p {
    margin: 0 0 6px 0;
}

.modal-section-title {
    color: var(--color-secondary) !important;
    font-weight: 700;
    font-family: var(--font-mono);
    font-size: 0.9em;
    letter-spacing: 1px;
    margin-top: 12px !important;
    margin-bottom: 4px !important;
}

.modal-section-title:first-child {
    margin-top: 0 !important;
}

.modal-list {
    padding-left: 12px;
    color: var(--color-text-dim) !important;
    font-family: var(--font-mono);
    font-size: 0.95em;
}

.container {
    display: flex;
    flex-direction: row;
    gap: 12px;
    width: 100%;
    flex: 1;
    min-height: 0;
}

.controls-section {
    background: var(--color-bg-light);
    border: 1px solid #2a3449;
    border-radius: 8px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 280px;
    min-width: 280px;
    transition: border-color 0.2s ease;
}

.controls-section:hover {
    border-color: var(--color-primary-dim);
}

.section-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #2a3449;
    padding-bottom: 6px;
}

.section-title {
    font-size: 0.8em;
    font-weight: 700;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mode-toggle {
    width: auto !important;
    padding: 3px 10px !important;
    font-size: 0.6em !important;
    font-family: var(--font-mono) !important;
    letter-spacing: 1px;
    border-radius: 3px !important;
    border-color: var(--color-accent-dim) !important;
    color: var(--color-accent) !important;
}

.mode-toggle:hover {
    background: var(--color-accent-dim) !important;
    color: var(--color-bg) !important;
}

.mode-toggle.game-active {
    background: var(--color-accent-dim) !important;
    color: var(--color-bg) !important;
    border-color: var(--color-accent) !important;
}

.displays-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-width: 0;
    min-height: 0;
}

.frequency-display {
    background: var(--color-bg-light);
    border: 1px solid #2a3449;
    border-radius: 8px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.frequency-display:hover {
    border-color: var(--color-primary-dim);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #2a3449;
    padding-bottom: 4px;
    flex-shrink: 0;
}

.panel-header h2 {
    font-size: 0.8em;
    font-weight: 700;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
}

.audio-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 3px;
    transition: background 0.15s ease;
}

.audio-toggle:hover {
    background: rgba(0, 170, 255, 0.08);
}

.audio-toggle label {
    font-size: 0.7em;
    color: var(--color-text-dim);
    text-transform: uppercase;
    cursor: pointer;
    user-select: none;
}

.audio-toggle .toggle-status {
    font-family: var(--font-mono);
    font-size: 0.65em;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 1px 5px;
    border-radius: 2px;
    transition: all 0.15s ease;
    user-select: none;
    cursor: pointer;
}

.audio-toggle .toggle-status.off {
    color: var(--color-text-dim);
    background: transparent;
    border: 1px solid #2a3449;
}

.audio-toggle .toggle-status.on {
    color: var(--color-bg);
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
}

input[type="checkbox"] {
    display: none;
}

canvas {
    background-color: var(--color-bg);
    border: 1px solid #2a3449;
    border-radius: 5px;
    display: block;
    width: 100%;
    flex: 1;
    min-height: 0;
    box-sizing: border-box;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 4px 0;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.control-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.control-group label {
    font-size: 0.7em;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.control-group span {
    font-family: var(--font-mono);
    font-size: 0.7em;
    color: var(--color-primary-bright);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 3px;
    background: #101622;
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 2px solid var(--color-bg-light);
    transition: background 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--color-primary-bright);
}

.fine-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
}

.fine-row label {
    font-size: 0.55em;
    color: #556677;
    text-transform: uppercase;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.fine-slider {
    height: 2px !important;
    background: #0c1018 !important;
}

.fine-slider::-webkit-slider-thumb {
    width: 10px !important;
    height: 10px !important;
    background: var(--color-primary-dim) !important;
    border: 1px solid var(--color-bg-light) !important;
}

.fine-slider::-webkit-slider-thumb:hover {
    background: var(--color-primary) !important;
}

button {
    background: transparent;
    border: 1px solid var(--color-primary-dim);
    color: var(--color-primary);
    padding: 6px 12px;
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 0.75em;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.15s ease;
    text-transform: uppercase;
    width: 100%;
}

button:hover {
    background: var(--color-primary-dim);
    color: var(--color-bg);
}

/* AI Assist */
.ai-assist {
    border-top: 1px solid #2a3449;
    padding: 6px 0 0 0;
}

.ai-title {
    font-size: 0.65em;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
    font-family: var(--font-mono);
}

.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

.ai-btn {
    font-size: 0.6em !important;
    font-family: var(--font-mono) !important;
    padding: 4px 6px !important;
    letter-spacing: 0.5px;
    border-color: var(--color-accent-dim) !important;
    color: var(--color-accent) !important;
    width: 100%;
}

.ai-btn:hover {
    background: var(--color-accent-dim) !important;
    color: var(--color-bg) !important;
}

.ai-btn.working {
    border-color: var(--color-accent) !important;
    color: var(--color-bg) !important;
    background: var(--color-accent-dim) !important;
    animation: ai-pulse 0.4s ease infinite;
    pointer-events: none;
}

@keyframes ai-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.ai-btn.done {
    border-color: var(--color-secondary) !important;
    color: var(--color-secondary) !important;
    background: transparent !important;
    animation: none;
    pointer-events: none;
}

.game-feedback {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 0;
    border-top: 1px solid #2a3449;
}

.match-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-light {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ff4466;
    flex-shrink: 0;
    transition: background 0.15s ease;
    box-shadow: 0 0 4px rgba(255, 68, 102, 0.5);
}

.status-message {
    font-family: var(--font-mono);
    font-size: 0.7em;
    letter-spacing: 1px;
    color: var(--color-secondary);
    min-height: 1.2em;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.status-message.visible {
    opacity: 1;
}

#matchPercentage {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--color-primary-bright);
    letter-spacing: 1px;
}

#difficultyLevel {
    font-family: var(--font-mono);
    font-size: 0.7em;
    color: var(--color-accent);
    letter-spacing: 1px;
}

.timer-bar-container {
    width: 100%;
    height: 6px;
    background: #101622;
    border-radius: 3px;
    overflow: hidden;
    margin: 4px 0;
}

.timer-bar {
    height: 100%;
    width: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.1s linear, background 0.3s ease;
}

.timer-bar.warning {
    background: var(--color-accent);
}

.timer-bar.danger {
    background: #ff4466;
    animation: pulse-bar 0.5s infinite;
}

@keyframes pulse-bar {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.score-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#scoreDisplay {
    font-family: var(--font-mono);
    font-size: 0.7em;
    color: var(--color-primary-bright);
    letter-spacing: 1px;
}

#streakDisplay {
    font-family: var(--font-mono);
    font-size: 0.7em;
    color: var(--color-secondary);
    letter-spacing: 1px;
}

.data-terminal .log-danger {
    color: #ff4466;
}

.data-terminal {
    flex: 1;
    min-height: 0;
    background: #060b12;
    border: 1px solid #1a2236;
    border-radius: 4px;
    padding: 6px 8px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.65em;
    line-height: 1.5;
    color: var(--color-primary-dim);
    scrollbar-width: thin;
    scrollbar-color: #1a2236 transparent;
}

.data-terminal::-webkit-scrollbar {
    width: 4px;
}

.data-terminal::-webkit-scrollbar-track {
    background: transparent;
}

.data-terminal::-webkit-scrollbar-thumb {
    background: #1a2236;
    border-radius: 2px;
}

.data-terminal .log-line {
    white-space: normal;
    word-break: break-all;
}

.data-terminal .log-prefix {
    color: #336688;
}

.data-terminal .log-info {
    color: var(--color-primary-dim);
}

.data-terminal .log-value {
    color: var(--color-primary-bright);
}

.data-terminal .log-warn {
    color: var(--color-accent);
}

.data-terminal .log-success {
    color: var(--color-secondary);
}

.game-actions {
    flex-shrink: 0;
    padding-top: 8px;
    border-top: 1px solid #2a3449;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

/* Practice mode: dim timer + score */
.timer-bar-container.practice-hidden {
    opacity: 0.2;
}

.score-row.practice-hidden {
    opacity: 0.3;
}

/* Round popup overlay */
.round-popup {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(5, 8, 14, 0.8);
    z-index: 80;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.round-popup.active {
    opacity: 1;
    pointer-events: auto;
}

.round-popup-icon {
    font-size: 2.5em;
    margin-bottom: 8px;
    font-family: var(--font-mono);
    font-weight: 700;
}

.round-popup-title {
    font-family: var(--font-mono);
    font-size: 1.6em;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.round-popup-detail {
    font-family: var(--font-mono);
    font-size: 0.9em;
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.round-popup-sub {
    font-family: var(--font-mono);
    font-size: 0.7em;
    color: var(--color-text-dim);
    letter-spacing: 1px;
    margin-top: 8px;
}

.round-popup.success .round-popup-icon { color: #00ff88; }
.round-popup.success .round-popup-title { color: #00ff88; }
.round-popup.success .round-popup-detail { color: var(--color-secondary); }

.round-popup.failure .round-popup-icon { color: #ff4466; }
.round-popup.failure .round-popup-title { color: #ff4466; }
.round-popup.failure .round-popup-detail { color: var(--color-accent); }

@media (max-width: 768px) {
    .terminal {
        padding: 10px;
    }
    .terminal-header h1 {
        font-size: 1.1em;
    }
    .container {
        flex-direction: column;
    }
    .controls-section {
        width: 100%;
        min-width: unset;
    }
    .displays-section {
        min-height: 0;
    }
}