/* ============================================
   CSS VARIABLES
   ============================================ */
   :root {
    /* Colors - Dark theme with teal/orange accent */
    --color-bg: #0a0e1a;
    --color-bg-secondary: #101622;
    --color-bg-card: #151b2b;
    --color-border: #1e2736;
    --color-border-light: #2a3447;
    
    --color-primary: #00d4ff;
    --color-primary-dark: #00a8cc;
    --color-accent: #ff6b35;
    --color-accent-light: #ff8c61;
    
    --color-text: #e8ecf2;
    --color-text-secondary: #8a95a8;
    --color-text-muted: #5a6375;
    
    --color-success: #00e676;
    --color-warning: #ffd740;
    --color-error: #ff5252;
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* 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 24px rgba(0, 212, 255, 0.15);
    
    /* 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: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

.mono {
    font-family: var(--font-mono);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    margin-bottom: var(--space-2xl);
    animation: slideDown 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.4));
}

.logo h1 {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.logo h1 span {
    color: var(--color-primary);
}

.tagline {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--color-text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ============================================
   CARD
   ============================================ */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    animation-delay: 0.2s;
    animation-fill-mode: both;
}

.card-header {
    margin-bottom: var(--space-xl);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.subtitle {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 300;
}

/* ============================================
   UPLOAD SECTION
   ============================================ */
.upload-section {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    animation-delay: 0.1s;
    animation-fill-mode: both;
}

.upload-area {
    border: 2px dashed var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--color-bg-secondary);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.upload-area:hover {
    border-color: var(--color-primary);
    background: rgba(0, 212, 255, 0.02);
}

.upload-area:hover::before {
    opacity: 1;
}

.upload-area.dragover {
    border-color: var(--color-primary);
    background: rgba(0, 212, 255, 0.05);
    transform: scale(1.02);
}

.upload-icon {
    margin-bottom: var(--space-md);
}

.upload-icon svg {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    opacity: 0.7;
    transition: all var(--transition-base);
}

.upload-area:hover .upload-icon svg {
    opacity: 1;
    transform: translateY(-4px);
}

.upload-text .upload-primary {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.upload-text .link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: underline;
    cursor: pointer;
}

.upload-text .upload-secondary {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

/* File Info */
.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    margin-top: var(--space-lg);
    animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.file-details {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex: 1;
}

.file-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.file-meta {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.file-size {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.remove-btn {
    background: transparent;
    border: none;
    padding: var(--space-xs);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.remove-btn:hover {
    color: var(--color-error);
    background: rgba(255, 82, 82, 0.1);
}

.remove-btn svg {
    width: 20px;
    height: 20px;
    display: block;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary,
.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    width: 100%;
    margin-top: var(--space-lg);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-bg);
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary .btn-icon,
.btn-secondary svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.btn-primary:hover:not(:disabled) .btn-icon {
    transform: translateX(4px);
}

.btn-secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border-light);
    width: auto;
    margin: 0;
}

.btn-secondary:hover {
    background: var(--color-bg-card);
    border-color: var(--color-primary);
}

/* ============================================
   RECORDING BUTTON & CONTROLS
   ============================================ */
.btn-record {
    width: 100%;
    padding: 1rem;
    margin-top: 1rem;
    background: linear-gradient(135deg, #7c3aed 0%, #5b21b6 100%);
    border: none;
    border-radius: 12px;
    color: white;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
}

.btn-record:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.3);
}

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

.record-icon {
    width: 24px;
    height: 24px;
    stroke: white;
}

.recording-controls {
    width: 100%;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(220, 38, 38, 0.1) 100%);
    border: 2px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.recording-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.recording-dot {
    width: 12px;
    height: 12px;
    background: #ef4444;
    border-radius: 50%;
    animation: pulse-record 1.5s ease-in-out infinite;
}

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

.recording-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: #ef4444;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
}

.btn-stop-record {
    padding: 0.75rem 2rem;
    background: #ef4444;
    border: none;
    border-radius: 8px;
    color: white;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-stop-record:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

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

/* ============================================
   WAVEFORM DECORATION
   ============================================ */
.waveform {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 60px;
    margin-top: var(--space-2xl);
    opacity: 0.3;
}

.wave-bar {
    width: 4px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% {
        height: 20%;
    }
    50% {
        height: 100%;
    }
}

/* ============================================
   RESULTS SECTION
   ============================================ */
.results-section {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-card {
    border: 1px solid var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.result-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.result-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* Diagnosis Badge */
.diagnosis-badge {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 168, 204, 0.05) 100%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
}

.badge-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.diagnosis-value {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

/* Confidence Meter */
.confidence-meter {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

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

.meter-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.meter-value {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.meter-bar {
    height: 12px;
    background: var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.meter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-primary) 100%);
    border-radius: 6px;
    transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.meter-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Result Meta */
.result-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.meta-item svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ============================================
   LOADING STATE
   ============================================ */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

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

.spinner {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.loading-waveform {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 40px;
}

.loading-wave {
    width: 4px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: loadingWave 1s ease-in-out infinite;
}

.loading-wave:nth-child(1) { animation-delay: 0s; }
.loading-wave:nth-child(2) { animation-delay: 0.1s; }
.loading-wave:nth-child(3) { animation-delay: 0.2s; }
.loading-wave:nth-child(4) { animation-delay: 0.3s; }
.loading-wave:nth-child(5) { animation-delay: 0.4s; }

@keyframes loadingWave {
    0%, 100% {
        height: 12px;
    }
    50% {
        height: 32px;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

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

.credits {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.credits strong {
    color: var(--color-primary);
}

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

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

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

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

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */
@media (min-width: 768px) {
    .container {
        padding: var(--space-2xl);
    }
    
    .card {
        padding: var(--space-2xl);
    }
    
    .logo h1 {
        font-size: 2.25rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .card-header h2 {
        font-size: 1.75rem;
    }
    
    .diagnosis-value {
        font-size: 2.25rem;
    }
    
    .btn-primary,
    .btn-secondary {
        width: auto;
        min-width: 200px;
    }
    
    .upload-area {
        padding: var(--space-3xl) var(--space-xl);
    }
    
    /* Recording button responsive */
    .btn-record {
        padding: 1.25rem;
        font-size: 1.05rem;
    }
    
    .record-icon {
        width: 28px;
        height: 28px;
    }
    
    .recording-time {
        font-size: 1.75rem;
    }
}

/* ============================================
   RESPONSIVE - DESKTOP
   ============================================ */
@media (min-width: 1024px) {
    .container {
        padding: var(--space-3xl);
    }
    
    .main {
        gap: var(--space-3xl);
    }
    
    .result-body {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
    
    .diagnosis-badge {
        grid-column: 1 / -1;
    }
    
    .result-meta {
        grid-template-columns: 1fr;
    }
}