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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

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

.auth-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    max-width: 450px;
    width: 100%;
}

.auth-card h1 {
    font-size: 2em;
    margin-bottom: 10px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 30px;
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.auth-tab-button {
    flex: 1;
    padding: 12px;
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
}

.auth-tab-button:hover {
    border-color: var(--primary-color);
    color: var(--text-color);
}

.auth-tab-button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.auth-form {
    animation: fadeIn 0.3s ease;
}

header {
    margin-bottom: 40px;
    padding: 30px 20px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1em;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-email {
    color: var(--text-color);
    font-weight: 600;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 10px;
    border-radius: 15px;
    flex-wrap: wrap;
}

.tab-button {
    flex: 1;
    padding: 15px 20px;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    min-width: 120px;
}

.tab-button:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-color);
}

.tab-button.active {
    background: var(--primary-color);
    color: white;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 600;
}

.form-group input[type="file"],
.form-group input[type="password"],
.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    font-size: 1em;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 0.85em;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: var(--border-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background: #475569;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    padding: 8px 16px;
    font-size: 0.9em;
}

.btn-danger:hover {
    background: #dc2626;
}

/* Sections */
.upload-section,
.keys-section,
.history-section {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.upload-section h2,
.keys-section h2,
.history-section h2 {
    margin-bottom: 25px;
    color: var(--text-color);
}

/* Status Section */
.status-section {
    margin-top: 30px;
    padding: 25px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 15px;
    border: 2px solid var(--primary-color);
}

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

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--bg-color);
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #8b5cf6);
    transition: width 0.3s ease;
    width: 0%;
}

/* Result Section */
.result-section {
    margin-top: 30px;
}

.result-card {
    background: var(--bg-color);
    border-radius: 15px;
    padding: 25px;
    border: 2px solid var(--success-color);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.transcription-text {
    line-height: 1.8;
    color: var(--text-color);
    white-space: pre-wrap;
    max-height: 400px;
    overflow-y: auto;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 10px;
}

/* Keys Section */
.key-form {
    background: var(--bg-color);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
}

.saved-keys {
    margin-top: 30px;
}

.keys-list {
    display: grid;
    gap: 15px;
}

.key-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 10px;
    border: 2px solid var(--border-color);
}

.key-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.key-provider {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1em;
}

.key-preview {
    color: var(--text-secondary);
    font-family: monospace;
}

/* History Section */
.history-list {
    display: grid;
    gap: 20px;
}

.history-item {
    background: var(--bg-color);
    padding: 25px;
    border-radius: 15px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.history-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.history-info {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.history-badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
}

.badge-completed {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.badge-processing {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
}

.badge-failed {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.history-text {
    margin-top: 15px;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 10px;
    color: var(--text-secondary);
    max-height: 150px;
    overflow: hidden;
    cursor: pointer;
}

.history-actions {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

.history-meta {
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-top: 10px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4em;
    margin-bottom: 20px;
}

/* OTP Verification Styles */
.verification-header {
    text-align: center;
    margin-bottom: 25px;
}

.verification-header h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.verification-header p {
    color: var(--text-secondary);
    font-size: 0.9em;
}

#otpCode {
    text-align: center;
    font-size: 1.5em;
    letter-spacing: 0.5em;
    font-weight: 600;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 0.9em;
    padding: 8px;
    transition: color 0.3s ease;
}

.btn-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .auth-card {
        padding: 30px 20px;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .user-menu {
        width: 100%;
        justify-content: space-between;
    }

    header h1 {
        font-size: 1.8em;
    }

    .tabs {
        flex-direction: column;
    }

    .tab-button {
        width: 100%;
    }

    .upload-section,
    .keys-section,
    .history-section {
        padding: 20px;
    }

    .result-header,
    .history-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}