@import url('https://fonts.googleapis.com/css2?family=Geist:wght@100;300;400;600;800&display=swap');

:root {
    --bg-base: #000000;
    --bg-card: #050505;
    --border: rgba(0, 212, 255, 0.15);
    --border-active: rgba(0, 212, 255, 0.6);
    --primary: #00d4ff;
    --primary-muted: rgba(0, 212, 255, 0.1);
    --primary-glow: rgba(0, 212, 255, 0.4);
    --text-main: #ffffff;
    --text-muted: #888888;
    --text-dim: #333333;
    --success: #00ffaa;
    --error: #ff3333;
    --font: 'Geist', 'Inter', system-ui, sans-serif;
    --grid-size: 40px;
}

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

body {
    font-family: var(--font);
    background-color: var(--bg-base);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    position: relative;
    
    /* Grid Pattern */
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 80%),
        linear-gradient(var(--text-dim) 0.5px, transparent 0.5px),
        linear-gradient(90deg, var(--text-dim) 0.5px, transparent 0.5px);
    background-size: 100% 100%, var(--grid-size) var(--grid-size), var(--grid-size) var(--grid-size);
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    opacity: 0.3;
    pointer-events: none;
}

/* Background Ornament: Dots */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(var(--text-dim) 0.5px, transparent 0.5px);
    background-size: 20px 20px;
    opacity: 0.2;
    z-index: -1;
}

.layout {
    max-width: 1300px;
    margin: 0 auto;
    padding: 100px 40px;
    display: flex;
    flex-direction: column;
    gap: 60px;
    position: relative;
}

@media (max-width: 768px) {
    .layout {
        padding: 20px 15px;
        gap: 20px;
    }
}

/* Frame Lines and + corners */
.layout::after {
    content: '+';
    position: absolute;
    top: 40px; left: 40px;
    color: var(--primary);
    font-weight: 300;
    opacity: 0.5;
}

/* Hero Section */
.hero {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 20px;
    border-left: 1px solid var(--border);
    padding-left: 32px;
}

@media (max-width: 768px) {
    .hero {
        padding-left: 15px;
        gap: 5px;
        border-left-width: 2px;
    }
    .status-badge { font-size: 0.6rem; margin-bottom: -5px; }
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    text-transform: uppercase;
}

.status-dot {
    width: 4px;
    height: 4px;
    background: var(--text-dim);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.03);
}

.active .status-dot {
    background: var(--primary);
    box-shadow: 0 0 15px var(--primary);
    animation: beacon 1.5s infinite;
}

@keyframes beacon { 
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 200;
    letter-spacing: -0.05em;
    line-height: 0.9;
    text-transform: uppercase;
}

.hero h1 span {
    font-weight: 800;
    color: var(--primary);
    text-shadow: 0 0 30px var(--primary-glow);
}

.hero p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 600px;
    font-weight: 300;
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero p { display: none; }
}

/* Bento Dashboard */
.dashboard {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

@media (max-width: 1024px) {
    .dashboard { display: flex; flex-direction: column; gap: 1px; }
}

/* Blocks */
.block {
    background: var(--bg-base);
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

@media (max-width: 768px) {
    .block {
        padding: 20px;
        gap: 20px;
    }
}

.block.main-panel { grid-column: span 8; }
.block.side-panel { grid-column: span 4; }

.block-header {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--primary);
    opacity: 0.8;
}

@media (max-width: 768px) {
    .block-header { display: none; }
}

/* Mode Grid - Bento style within blocks */
.modes-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 640px) {
    .modes-container {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
}

.mode-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    padding: 30px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 20px; height: 20px;
    background: linear-gradient(135deg, transparent 50%, var(--border) 50%);
}

.mode-card:hover {
    background: rgba(0, 212, 255, 0.03);
    border-color: var(--primary);
    transform: translateY(-4px);
}

.mode-card.active {
    background: var(--primary-muted);
    border-color: var(--primary);
    box-shadow: inset 0 0 20px var(--primary-muted);
}

.mode-card .icon-wrap {
    width: 40px;
    height: 40px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.mode-card.active .icon-wrap {
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary));
}

.mode-text h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mode-text p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.mode-freq {
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--primary);
    margin-top: 15px;
}

@media (max-width: 768px) {
    .mode-card { 
        padding: 12px; 
        display: flex; 
        flex-direction: column; 
        align-items: center; 
        text-align: center;
        justify-content: center;
        min-height: 100px;
    }
    .mode-card .icon-wrap { 
        margin-bottom: 5px; 
        width: 24px; 
        height: 24px; 
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .mode-card .icon-wrap span { font-size: 20px; }
    .mode-text h3 { font-size: 0.75rem; margin-bottom: 2px; }
    .mode-text p { display: none; }
    .mode-freq { margin-top: 5px; font-size: 0.55rem; opacity: 0.7; }
}

/* Monitor Display */
.monitor {
    background: var(--bg-base);
}

.freq-display {
    position: relative;
    padding: 30px 40px;
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.08), transparent);
    border: 1px solid var(--border);
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .freq-display { padding: 20px; margin-bottom: 10px; }
    .freq-number { font-size: 3.5rem; }
}

.freq-number {
    font-size: clamp(4rem, 15vw, 6rem);
    font-weight: 100;
    letter-spacing: -0.08em;
    color: var(--text-main);
    line-height: 1;
}

.freq-unit {
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--primary);
    vertical-align: super;
}

/* Scanlines Animation */
.freq-display::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(0, 212, 255, 0.1) 50%, transparent 50%);
    background-size: 100% 4px;
    pointer-events: none;
    opacity: 0.1;
}

/* Visualizer */
.visualizer {
    height: 100px;
    display: flex;
    align-items: flex-end;
    gap: 3px;
    padding: 0 10px;
}

@media (max-width: 768px) {
    .visualizer { display: none; }
}

.viz-bar {
    flex: 1;
    background: var(--primary);
    opacity: 0.2;
    transition: height 0.1s ease;
}

/* Controls */
.controls-group {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

@media (max-width: 768px) {
    .controls-group { gap: 15px; }
}

.volume-bar {
    border-bottom: 1px solid var(--border);
    padding-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 20px;
}

input[type=range] {
    flex: 1;
    appearance: none;
    background: var(--text-dim);
    height: 2px;
}

input[type=range]::-webkit-slider-thumb {
    appearance: none;
    width: 12px; height: 12px;
    background: var(--primary);
    border-radius: 0;
    box-shadow: 0 0 10px var(--primary);
}

.btn-action {
    width: 100%;
    padding: 24px;
    border: 1px solid var(--primary);
    background: transparent;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s;
}

@media (max-width: 768px) {
    .btn-action { padding: 18px; font-size: 0.8rem; }
}

.btn-action:hover:not(:disabled) {
    background: var(--primary);
    color: #000;
    box-shadow: 0 0 50px var(--primary-glow);
}

.btn-action:disabled {
    border-color: var(--text-dim);
    color: var(--text-dim);
    cursor: not-allowed;
}

.btn-action.active {
    background: var(--error);
    border-color: var(--error);
    color: #fff;
    animation: glow-error 1.5s infinite alternate;
}

@keyframes glow-error {
    from { box-shadow: 0 0 20px rgba(255, 51, 51, 0.2); }
    to { box-shadow: 0 0 40px rgba(255, 51, 51, 0.6); }
}

/* Info Card */
.info-card {
    border-top: 1px solid var(--border);
    padding-top: 30px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 300;
}

@media (max-width: 768px) {
    .info-card { display: none; }
}

.info-card strong {
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border);
    margin-top: 20px;
}

.stat-card {
    background: var(--bg-base);
    padding: 20px;
}

@media (max-width: 768px) {
    .stat-card { padding: 10px; }
    .stat-value { font-size: 1rem; }
}

.stat-label { font-size: 0.6rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.2em; margin-bottom: 8px; }
.stat-value { font-size: 1.2rem; font-weight: 300; color: var(--text-main); }

footer {
    border-top: 1px solid var(--border);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    color: var(--text-dim);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@media (max-width: 640px) {
    footer {
        flex-direction: column;
        align-items: flex-start;
    }
}

footer a {
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

footer a:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}