/* ===== Design Tokens ===== */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-card: rgba(22, 22, 50, 0.85);
    --bg-card-hover: rgba(30, 30, 65, 0.9);
    --bg-input: rgba(8, 8, 26, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.04);

    --text-primary: #e8e8f0;
    --text-secondary: #9b9bb0;
    --text-muted: #6b6b80;

    --accent: #7c6cff;
    --accent-bright: #a78bfa;
    --accent-glow: rgba(124, 108, 255, 0.25);
    --accent-hover: #6556e0;

    --success: #34d399;
    --success-bg: rgba(52, 211, 153, 0.12);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.12);
    --warning: #fbbf24;

    --border: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(124, 108, 255, 0.3);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--accent-glow);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at 20% 0%, rgba(124, 108, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(52, 211, 153, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.65;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== Header ===== */
header {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0.9rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}

.logo {
    font-size: 1.35rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-bright), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== Navigation Tabs ===== */
nav {
    display: flex;
    gap: 0.35rem;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    padding: 0.5rem 2rem;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.55rem 1.2rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    position: relative;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
    border-color: var(--border);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-glow);
    font-weight: 600;
}

/* ===== Main Container ===== */
.container {
    padding: 2rem;
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.card:hover {
    border-color: var(--border-accent);
}

/* ===== Section Titles ===== */
.section-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1.8rem;
}

h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.2rem 0;
}

/* ===== Inputs & Textareas ===== */
input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.7rem 0.9rem;
    border-radius: var(--radius-sm);
    width: 100%;
    font-size: 0.9rem;
    font-family: inherit;
    transition: all var(--transition);
    outline: none;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.inline-input {
    width: 60px !important;
    display: inline-block;
    padding: 0.4rem 0.6rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
    margin-top: 0.8rem;
    font-weight: 500;
}

/* ===== Buttons ===== */
button {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    border: none;
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    transition: all var(--transition);
    letter-spacing: 0.01em;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
    filter: brightness(1.1);
}

button:active {
    transform: translateY(0);
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    padding: 0.85rem 2rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    margin-top: 2rem;
    width: 100%;
    box-shadow: var(--shadow-sm);
}

.success-btn {
    background: linear-gradient(135deg, var(--success), #059669) !important;
}

.success-btn:hover {
    box-shadow: 0 0 25px rgba(52, 211, 153, 0.3);
}

.danger-btn {
    background: linear-gradient(135deg, var(--danger), #dc2626) !important;
}

.danger-btn:hover {
    box-shadow: 0 0 25px rgba(248, 113, 113, 0.3);
}

/* ===== Config Panel (Settings) ===== */
.config-panel {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.2rem 1.5rem;
}

.config-row {
    display: flex;
    align-items: center;
    padding: 0.7rem 0;
    gap: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.config-row:last-child {
    border-bottom: none;
}

.config-label {
    display: inline-block !important;
    min-width: 100px;
    width: 100px;
    flex-shrink: 0;
    color: var(--text-primary) !important;
    font-weight: 600 !important;
    font-size: 0.88rem !important;
    margin: 0 !important;
}

.config-options {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.config-hint {
    color: var(--text-muted);
    font-size: 0.82rem;
    margin: 0 0.3rem;
}

.config-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
    margin: 0.6rem 0;
}

/* ===== Radio Pill ===== */
.radio-pill {
    display: inline-flex !important;
    margin: 0 !important;
    cursor: pointer;
}

.radio-pill input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-pill span {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
}

.radio-pill input:checked + span {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.radio-pill:hover span {
    border-color: var(--accent);
}

.radio-pill.small span {
    padding: 0.25rem 0.65rem;
    font-size: 0.78rem;
}

/* ===== Toggle Switch ===== */
.toggle-switch {
    position: relative;
    display: inline-block !important;
    width: 42px;
    height: 24px;
    flex-shrink: 0;
    margin: 0 !important;
    cursor: pointer;
}

.toggle-switch input {
    appearance: none;
    -webkit-appearance: none;
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-switch .slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 999px;
    transition: all var(--transition);
}

.toggle-switch .slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 2px;
    bottom: 2px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition);
}

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

.toggle-switch input:checked + .slider::before {
    transform: translateX(18px);
    background: #fff;
}

/* ===== Drop Zone ===== */
.drop-zone {
    border: 2px dashed var(--border-accent);
    padding: 3.5rem 2rem;
    text-align: center;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
    background: var(--bg-glass);
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, var(--accent-glow), transparent 70%);
    opacity: 0;
    transition: opacity var(--transition);
}

.drop-zone:hover::before,
.drop-zone.hover::before {
    opacity: 1;
}

.drop-zone:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.drop-zone.hover {
    border-color: var(--accent-bright);
    background: rgba(124, 108, 255, 0.08);
}

.drop-zone p {
    position: relative;
    z-index: 1;
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== Results ===== */
.result-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.result-column {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.result-text {
    height: 400px;
    overflow-y: auto;
    white-space: pre-wrap;
    background: var(--bg-input);
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    color: var(--text-primary);
    border: 1px solid var(--border);
    line-height: 1.7;
}

.result-text::-webkit-scrollbar {
    width: 6px;
}

.result-text::-webkit-scrollbar-track {
    background: transparent;
}

.result-text::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ===== Recorder UI ===== */
.recording-ui {
    text-align: center;
}

.timer {
    font-size: 3.5rem;
    font-weight: 700;
    margin: 1.5rem 0;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.05em;
    text-shadow: 0 0 30px var(--accent-glow);
}

.volume-bars {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem auto;
    max-width: 500px;
}

.volume-group {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.volume-group label {
    margin: 0;
    font-size: 0.82rem;
    min-width: 80px;
    text-align: right;
    color: var(--text-secondary);
}

.volume-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-input);
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.volume-inner {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    width: 0%;
    transition: width 0.08s ease-out;
    border-radius: 999px;
}

.recorder-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* ===== Admin Layout ===== */
.admin-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.admin-nav .tab-btn {
    text-align: left;
    padding: 0.7rem 1rem;
    border-radius: var(--radius-sm);
}

/* ===== Tables ===== */
table {
    width: 100%;
    border-collapse: collapse;
}

th {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 2px solid var(--border);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.88rem;
}

tr:hover td {
    background: var(--bg-glass);
}

/* ===== Auth Page ===== */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.auth-card {
    width: 420px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent-bright), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Modal ===== */
.modal {
    backdrop-filter: blur(8px);
}

.modal-content {
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== Form Groups ===== */
.form-group {
    margin-bottom: 0.6rem;
}

/* ===== Checkbox Styling (general) ===== */
input[type="checkbox"] {
    width: auto;
    accent-color: var(--accent);
}

input[type="radio"] {
    width: auto;
    accent-color: var(--accent);
}

/* ===== Copy / Download Buttons ===== */
.copy-btn, .download-btn {
    margin-top: 0.8rem;
    margin-right: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.82rem;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.copy-btn:hover, .download-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--accent-glow);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    header {
        padding: 0.7rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    nav {
        padding: 0.4rem 1rem;
        overflow-x: auto;
    }

    .container {
        padding: 1rem;
    }

    .result-container {
        grid-template-columns: 1fr;
    }

    .admin-layout {
        grid-template-columns: 1fr;
    }

    .config-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .config-label {
        min-width: auto !important;
        width: auto !important;
        margin-bottom: 0.4rem !important;
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.18);
}

/* ===== Selection ===== */
::selection {
    background: var(--accent);
    color: #fff;
}