/* ================================================
   SRG Sound Report — Mobile-First Design System
   ================================================ */

:root {
    /* Dark Theme Tokens */
    --bg-deep: #060a0f;
    --bg-surface: rgba(255, 255, 255, 0.04);
    --bg-card: rgba(20, 24, 32, 0.85);
    --bg-input: rgba(0, 0, 0, 0.5);
    --accent: #f59e0b;
    --accent-glow: rgba(245, 158, 11, 0.35);
    --accent-blue: #3b82f6;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --text-primary: #f8fafc;
    --text-secondary: #64748b;
    --text-dim: #475569;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(245, 158, 11, 0.6);
    --glass-blur: blur(16px);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* Safe areas for notch devices */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);

    /* Layout dimensions */
    --header-height: 52px;
    --tabbar-height: 64px;
}

/* Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'IBM Plex Mono', monospace;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    height: 100dvh;
    /* Dynamic viewport height for mobile */
    width: 100vw;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   App Shell — Mobile-first stacked layout
   ============================================ */
#app {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

/* ============================================
   Header
   ============================================ */
.app-header {
    flex-shrink: 0;
    height: var(--header-height);
    background: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Outfit', sans-serif;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent), #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@keyframes liveGlow {
    0%, 100% { opacity: 1; filter: drop-shadow(0 0 4px rgba(245, 158, 11, 0.5)); }
    50%       { opacity: 0.25; filter: drop-shadow(0 0 2px rgba(245, 158, 11, 0.1)); }
}

.logo-text.live {
    animation: liveGlow 1.4s ease-in-out infinite;
}

input.dup-code {
    border-color: var(--accent-red) !important;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.25);
}

input.invalid-code {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.logo-sub {
    font-weight: 300;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.mode-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 100px;
    border: 1px solid var(--border-color);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

.badge-text {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent);
}

/* ============================================
   Main Content Area
   ============================================ */
.engine-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 16px;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

/* ============================================
   Bottom Tab Bar
   ============================================ */
.app-tabbar {
    flex-shrink: 0;
    height: var(--tabbar-height);
    background: rgba(8, 10, 15, 0.95);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0 8px;
    z-index: 100;
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    min-width: 60px;
    -webkit-user-select: none;
    user-select: none;
}

.tab-item:active {
    transform: scale(0.92);
}

.tab-item.active {
    color: var(--accent);
}

.tab-item.active .tab-label {
    color: var(--accent);
}

.tab-icon {
    width: 22px;
    height: 22px;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.tab-label {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   Cards — Glass UI
   ============================================ */
.plan-dashboard {
    max-width: 600px;
    margin: 0 auto;
    animation: slideUp 0.4s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
}

.card-header {
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.card-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ============================================
   Form Inputs — Touch-optimized
   ============================================ */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
}

input[type="text"],
input[type="tel"],
input[type="email"],
input[type="number"],
select,
textarea {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    width: 100%;
    min-height: 48px;
    /* minimum touch target */
    -webkit-appearance: none;
    appearance: none;
}

input[type="text"]:focus,
input[type="tel"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

input::placeholder {
    color: var(--text-dim);
    font-size: 0.85rem;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

/* ============================================
   Channel List Table (Mobile)
   ============================================ */
.channel-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.channel-row {
    display: grid;
    grid-template-columns: 62px 1fr 80px auto;
    gap: 8px;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    animation: slideUp 0.3s ease-out;
}

.channel-row .ch-num {
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--accent);
    text-align: center;
}

.channel-row input {
    min-height: 36px;
    padding: 8px 10px;
    font-size: 0.85rem;
}

.channel-row .freq {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: right;
    white-space: nowrap;
}

.channel-row .freq.valid {
    color: var(--accent-green);
}

.channel-row .freq.error {
    color: var(--accent-red);
}

.channel-row .freq.dup {
    color: var(--accent);
    font-weight: 600;
}

input[readonly] {
    color: var(--text-secondary);
    cursor: default;
    pointer-events: none;
}

.btn-remove {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-remove:active {
    color: var(--accent-red);
    transform: scale(0.9);
}

/* ============================================
   Take List (Mobile)
   ============================================ */
.take-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.take-row {
    display: grid;
    grid-template-columns: 68px 50px 1fr auto;
    gap: 8px;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.take-row input {
    min-height: 36px;
    padding: 8px 10px;
    font-size: 0.85rem;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    min-height: 48px;
    -webkit-user-select: none;
    user-select: none;
}

.btn:active {
    transform: scale(0.97);
    opacity: 0.9;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:active {
    background: var(--bg-surface);
}

/* ============================================
   Share Summary
   ============================================ */
.summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.summary-item .label {
    font-size: 0.6rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.summary-item .value {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   Report Preview Table (Share Tab)
   ============================================ */
.report-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.report-table thead tr {
    border-bottom: 1px solid var(--border-color);
}

.report-table th {
    padding: 6px 8px;
    font-size: 0.6rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: left;
}

.report-table td {
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.report-table tbody tr:last-child td {
    border-bottom: none;
}

/* ============================================
   Responsive — Tablet and Desktop
   ============================================ */
@media (min-width: 768px) {
    :root {
        --header-height: 56px;
    }

    .app-header {
        padding: 0 24px;
    }

    .engine-container {
        padding: 24px 32px;
    }

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

    .plan-dashboard {
        max-width: 720px;
    }

    .channel-row {
        grid-template-columns: 62px 1fr 100px auto;
    }

    .take-row {
        grid-template-columns: 80px 60px 1fr auto;
    }
}

@media (min-width: 1024px) {
    :root {
        --tabbar-height: 56px;
    }

    .app-tabbar {
        justify-content: center;
        gap: 8px;
    }

    .tab-item {
        flex-direction: row;
        gap: 8px;
        padding: 8px 20px;
        min-width: auto;
    }

    .tab-icon {
        width: 18px;
        height: 18px;
    }

    .tab-label {
        font-size: 0.7rem;
    }

    .plan-dashboard {
        max-width: 800px;
    }

    .engine-container {
        padding: 32px 48px;
    }
}

/* ============================================
   Utility & Animations
   ============================================ */
.text-accent {
    color: var(--accent);
}

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

.text-red {
    color: var(--accent-red);
}

.text-dim {
    color: var(--text-dim);
}

.mb-12 {
    margin-bottom: 12px;
}

.mb-16 {
    margin-bottom: 16px;
}

.mt-16 {
    margin-top: 16px;
}

.divider {
    height: 1px;
    background: var(--border-color);
    margin: 16px 0;
}

/* ============================================
   Save Indicator Dot
   ============================================ */
#save-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    opacity: 0;
    transition: background 0.2s ease, opacity 0.3s ease;
}

#save-dot.saving {
    opacity: 1;
    background: var(--accent);
    box-shadow: 0 0 6px var(--accent-glow);
}

#save-dot.saved {
    opacity: 1;
    background: var(--accent-green);
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.4);
}

/* Reset button danger state */
.btn-danger {
    color: var(--accent-red) !important;
    border-color: var(--accent-red) !important;
}