/* =============================================
   VocalGuard - Modern Blue/Cyan Theme with Blur Effects
   ============================================= */

:root {
    --primary-bg: #0a0e27;
    --secondary-bg: #131b35;
    --card-bg: rgba(19, 27, 53, 0.6);
    --blur-bg: rgba(19, 27, 53, 0.8);
    
    --primary-blue: #00d4ff;
    --secondary-cyan: #00ffcc;
    --accent-purple: #7b2ff7;
    
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    
    --success: #00ff88;
    --warning: #ffaa00;
    --danger: #ff4444;
    
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #0f1729 50%, var(--secondary-bg) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* =============================================
   Loading Spinner
   ============================================= */

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: var(--transition);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(0, 212, 255, 0.1);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =============================================
   Auth Page
   ============================================= */

.page {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.page.active {
    display: block;
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    padding: 48px;
    max-width: 440px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(0, 212, 255, 0.1);
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-text {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 8px;
    animation: gradient-shift 3s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 14px;
}

.auth-form {
    transition: var(--transition);
}

.auth-form.hidden {
    display: none;
}

.auth-form h2 {
    color: var(--text-primary);
    margin-bottom: 24px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 15px;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-cyan));
    color: #000;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-blue);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #ff6666;
    transform: translateY(-2px);
}

.form-switch {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-switch a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
}

.form-switch a:hover {
    text-decoration: underline;
}

.error-message {
    background: rgba(255, 68, 68, 0.1);
    border: 1px solid var(--danger);
    border-radius: var(--border-radius);
    padding: 12px;
    margin-top: 16px;
    color: var(--danger);
    font-size: 14px;
    text-align: center;
}

.error-message.hidden {
    display: none;
}

/* =============================================
   App Header
   ============================================= */

.app-header {
    background: var(--blur-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-text-small {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(0, 212, 255, 0.1);
}

.nav-link.active {
    color: var(--primary-blue);
    background: rgba(0, 212, 255, 0.15);
}

.nav-icon {
    font-size: 18px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-email {
    color: var(--text-secondary);
    font-size: 14px;
}

/* =============================================
   Main Content
   ============================================= */

.app-page {
    min-height: calc(100vh - 200px);
    padding: 40px 0;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.app-page.active {
    opacity: 1;
    transform: translateY(0);
}

.app-page.hidden {
    display: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.page-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =============================================
   Dashboard Stats
   ============================================= */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
    border-color: var(--primary-blue);
}

.stat-icon {
    font-size: 40px;
    opacity: 0.8;
}

.stat-content {
    flex: 1;
}

.stat-content h3 {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-blue);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 4px;
    margin-top: 12px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-cyan));
    border-radius: 4px;
    transition: width 0.6s ease;
}

/* =============================================
   Upload Section
   ============================================= */

.upload-section {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 32px;
    margin-bottom: 40px;
}

.upload-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.upload-area {
    border: 2px dashed rgba(0, 212, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(0, 212, 255, 0.02);
}

.recording-area {
    border: 2px dashed rgba(0, 212, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 48px 24px;
    text-align: center;
    transition: var(--transition);
    background: rgba(0, 212, 255, 0.02);
}

.recording-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
    font-size: 16px;
    color: #ff4444;
    font-weight: 600;
}

.recording-indicator {
    width: 12px;
    height: 12px;
    background: #ff4444;
    border-radius: 50%;
    animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

#record-btn.recording {
    background: linear-gradient(135deg, #ff4444, #cc0000);
}

#record-btn.recording:hover {
    background: linear-gradient(135deg, #ff5555, #dd0000);
}

.upload-area:hover, .upload-area.drag-over {
    border-color: var(--primary-blue);
    background: rgba(0, 212, 255, 0.05);
}

.upload-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.6;
}

.upload-hint {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 8px;
}

.file-info {
    margin-top: 16px;
    padding: 12px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.file-info #file-name {
    font-weight: 600;
    color: var(--primary-blue);
    font-size: 14px;
}

.file-info #file-size {
    color: var(--text-muted);
    font-size: 12px;
}

.upload-section .btn {
    margin-top: 20px;
}

.btn.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3); }
    50% { box-shadow: 0 10px 40px rgba(0, 212, 255, 0.6); }
}

/* =============================================
   Results Section
   ============================================= */

.results-section {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 32px;
    margin-bottom: 40px;
    animation: slideUp 0.5s ease-out;
}

.results-section.hidden {
    display: none;
}

.results-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

.result-card {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--border-radius);
    padding: 24px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.result-header h4 {
    font-size: 18px;
    color: var(--text-primary);
}

.status-badge {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-safe {
    background: rgba(0, 255, 136, 0.2);
    color: var(--success);
    border: 1px solid var(--success);
}

.status-suspicious {
    background: rgba(255, 170, 0, 0.2);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.status-risky {
    background: rgba(255, 68, 68, 0.2);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.result-details {
    margin-top: 20px;
}

.result-score {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.score-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.score-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
}

.result-bar {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 16px;
}

.result-bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.8s ease;
}

.result-bar-fill.risk-low {
    background: linear-gradient(90deg, var(--success), #00ff66);
}

.result-bar-fill.risk-medium {
    background: linear-gradient(90deg, var(--warning), #ffcc00);
}

.result-bar-fill.risk-high {
    background: linear-gradient(90deg, var(--danger), #ff6666);
}

.result-message {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border-left: 4px solid var(--primary-blue);
}

/* Breakdown Scores */
.breakdown-scores {
    margin: 24px 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.breakdown-item {
    margin-bottom: 20px;
}

.breakdown-item:last-child {
    margin-bottom: 0;
}

.breakdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.breakdown-label {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.breakdown-value {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 700;
}

.breakdown-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.breakdown-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.8s ease;
}

/* =============================================
   History Section
   ============================================= */

.history-section {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 32px;
}

.history-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.05);
    transition: var(--transition);
}

.history-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 212, 255, 0.2);
}

.history-info h4 {
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.history-time {
    font-size: 12px;
    color: var(--text-muted);
}

.history-result {
    display: flex;
    align-items: center;
    gap: 12px;
}

.history-score {
    font-size: 14px;
    color: var(--text-secondary);
}

.no-data {
    text-align: center;
    color: var(--text-muted);
    padding: 32px;
    font-style: italic;
}

/* =============================================
   Settings Page
   ============================================= */

.settings-grid {
    display: grid;
    gap: 24px;
}

.settings-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 24px;
}

.settings-card h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.settings-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.settings-item:last-child {
    border-bottom: none;
}

.settings-item label {
    color: var(--text-secondary);
    font-size: 14px;
}

.settings-item span {
    color: var(--text-primary);
    font-size: 14px;
}

.uid-text {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: var(--primary-blue);
}

.settings-select {
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.danger-zone {
    border-color: rgba(255, 68, 68, 0.3);
}

/* =============================================
   About Page
   ============================================= */

.about-content {
    max-width: 900px;
}

.about-section {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 32px;
    margin-bottom: 24px;
}

.about-section h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--primary-blue);
}

.about-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.about-section ul {
    list-style: none;
    padding-left: 0;
}

.about-section li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.about-section li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--primary-blue);
}

.about-section strong {
    color: var(--text-primary);
}

/* =============================================
   Footer
   ============================================= */

.app-footer {
    background: var(--blur-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(0, 212, 255, 0.1);
    padding: 24px 0;
    text-align: center;
    margin-top: 60px;
}

.app-footer p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--primary-blue);
    text-decoration: none;
    margin: 0 8px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-cyan);
}

/* =============================================
   Toast Notification
   ============================================= */

.toast {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: var(--blur-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 16px 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.hidden {
    display: none;
}

#toast-message {
    color: var(--text-primary);
    font-size: 14px;
}

/* =============================================
   Responsive Design
   ============================================= */

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .main-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-link {
        justify-content: center;
    }
    
    .user-info {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .auth-card {
        padding: 32px 24px;
    }
    
    .logo-text {
        font-size: 36px;
    }
    
    .page-title {
        font-size: 28px;
    }
    
    .result-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .history-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .toast {
        right: 16px;
        left: 16px;
        bottom: 16px;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* =============================================
   Utility Classes
   ============================================= */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* =============================================
   Sound Controls
   ============================================= */

.settings-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    margin-right: 10px;
    accent-color: var(--primary-blue);
    vertical-align: middle;
}

.settings-item input[type="range"] {
    cursor: pointer;
    accent-color: var(--primary-blue);
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    transition: var(--transition);
}

.settings-item input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.6);
    transition: var(--transition);
}

.settings-item input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--secondary-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.8);
    transform: scale(1.1);
}

.settings-item input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.6);
    transition: var(--transition);
}

.settings-item input[type="range"]::-moz-range-thumb:hover {
    background: var(--secondary-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.8);
    transform: scale(1.1);
}

#volume-display {
    display: inline-block;
    min-width: 45px;
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 14px;
}