/* ========================================
   VoiceScribe - Premium Dark Theme
   Modern UI/UX Design System
   ======================================== */

/* CSS Variables - Dark Theme */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-elevated: #22222e;
    --bg-hover: #2a2a38;
    
    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-primary-hover: #818cf8;
    --accent-primary-glow: rgba(99, 102, 241, 0.3);
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    
    /* Semantic Colors */
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.3);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.4);
    --warning: #f59e0b;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-disabled: #475569;
    
    /* Border & Dividers */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--accent-primary-glow);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(139, 92, 246, 0.1), transparent),
        radial-gradient(ellipse 60% 40% at 0% 100%, rgba(99, 102, 241, 0.08), transparent);
    pointer-events: none;
    z-index: -1;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   Header
   ======================================== */
.header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    animation: fadeInDown 0.6s ease-out;
}

.logo {
    font-size: 3rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    font-size: 2.5rem;
    -webkit-text-fill-color: initial;
    filter: drop-shadow(0 0 20px var(--accent-primary-glow));
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* ========================================
   Main Content
   ======================================== */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

/* ========================================
   Cards - Shared Styles
   ======================================== */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

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

/* ========================================
   API Key Section
   ======================================== */
.api-key-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.api-key-container:hover {
    border-color: var(--border-default);
}

.api-key-container.hidden {
    display: none;
}

.api-key-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.input-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.input-label span {
    font-size: 1.1rem;
}

.api-link {
    font-size: 0.85rem;
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.api-link:hover {
    color: var(--accent-primary-hover);
}

.api-key-input-group {
    display: flex;
    gap: var(--space-sm);
}

.input-text {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.95rem;
    font-family: var(--font-mono);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.input-text:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

.api-key-status {
    margin-top: var(--space-sm);
    font-size: 0.85rem;
    color: var(--success);
    font-weight: 500;
}

.api-key-status.error {
    color: var(--danger);
}

/* ========================================
   Audio Input Selector
   ======================================== */
.input-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    flex-wrap: wrap;
}

.input-select {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.input-select:hover {
    border-color: var(--border-hover);
    background-color: var(--bg-hover);
}

.input-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

.input-select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   Status Indicator
   ======================================== */
.status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    width: fit-content;
    margin: 0 auto;
    border: 1px solid var(--border-subtle);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: all var(--transition-base);
}

.status.recording .status-dot {
    background: var(--danger);
    box-shadow: 0 0 12px var(--danger-glow);
    animation: pulse 1.5s infinite;
}

.status.success .status-dot {
    background: var(--success);
    box-shadow: 0 0 12px var(--success-glow);
}

.status-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.3);
    }
}

/* ========================================
   Recording Controls
   ======================================== */
.controls {
    display: flex;
    justify-content: center;
    padding: var(--space-md) 0;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-sans);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

.btn:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), 0 0 20px var(--accent-primary-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.85rem;
}

/* Record Button */
.btn-record {
    position: relative;
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.1rem;
    background: var(--accent-gradient);
    color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.btn-record::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.btn-record:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-record:active:not(:disabled) {
    transform: translateY(0) scale(1);
}

.btn-record.recording {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    animation: recordingPulse 2s infinite;
}

.btn-record.recording:hover:not(:disabled) {
    box-shadow: var(--shadow-lg), 0 0 30px var(--danger-glow);
}

@keyframes recordingPulse {
    0%, 100% {
        box-shadow: var(--shadow-md), 0 0 20px var(--danger-glow);
    }
    50% {
        box-shadow: var(--shadow-lg), 0 0 40px var(--danger-glow);
    }
}

.btn-icon {
    font-size: 1.3rem;
}

/* Secondary Button */
.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

/* Icon Only Button */
.btn-icon-only {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    font-size: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.btn-icon-only:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: rotate(180deg);
}

/* ========================================
   Transcript Container
   ======================================== */
.transcript-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 350px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.transcript-container:hover {
    border-color: var(--border-default);
}

.transcript-container:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

.transcript-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-tertiary);
}

.transcript-header h2 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.transcript-header h2::before {
    content: '📝';
    font-size: 1rem;
}

.word-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-primary);
    border-radius: var(--radius-full);
}

.transcript {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.transcript::-webkit-scrollbar {
    width: 6px;
}

.transcript::-webkit-scrollbar-track {
    background: transparent;
}

.transcript::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: var(--radius-full);
}

.transcript::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

.transcript .placeholder {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: var(--space-2xl) var(--space-md);
}

.transcript .interim {
    color: var(--text-muted);
    background: linear-gradient(90deg, var(--text-muted), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.transcript .final {
    color: var(--text-primary);
}

/* ========================================
   Action Buttons
   ======================================== */
.actions {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    padding: var(--space-sm) 0;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    margin-top: var(--space-2xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: fadeIn 0.6s ease-out 0.4s both;
}

.footer p {
    margin-bottom: var(--space-xs);
}

.footer-note {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ========================================
   Toast Notification
   ======================================== */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-elevated);
    color: var(--text-primary);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1000;
    border: 1px solid var(--border-default);
    backdrop-filter: blur(10px);
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    border-color: var(--success);
    color: var(--success);
}

.toast.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    border-color: var(--danger);
    color: var(--danger);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 640px) {
    .container {
        padding: var(--space-lg) var(--space-md);
    }

    .logo {
        font-size: 2.2rem;
    }

    .logo-icon {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .input-selector {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-md);
    }

    .input-select {
        min-width: 100%;
        max-width: 100%;
    }

    .api-key-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .api-key-input-group {
        flex-direction: column;
    }

    .btn-record {
        padding: var(--space-md) var(--space-xl);
        font-size: 1rem;
    }

    .transcript-container {
        min-height: 280px;
    }

    .transcript {
        font-size: 1rem;
        padding: var(--space-md);
    }

    .actions {
        gap: var(--space-xs);
    }

    .btn-secondary {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
    }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --border-subtle: rgba(255, 255, 255, 0.2);
        --border-default: rgba(255, 255, 255, 0.3);
        --text-secondary: #b8c5d6;
    }
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: white;
}

/* Focus visible for keyboard users */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}