/* ============================================
   Austin's Wonderful Formatting Expert
   Modern Dark Theme CSS - Integrated Hero
   ============================================ */

:root {
    /* Color Palette - Professional Dark Theme */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: rgba(28, 33, 40, 0.95);

    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;

    --accent-primary: #c9a227;
    --accent-secondary: #b8860b;
    --accent-glow: rgba(201, 162, 39, 0.3);

    --border-color: #30363d;
    --border-highlight: #484f58;

    --success: #3fb950;
    --error: #f85149;

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html, body {
    height: 100%;
    overflow: hidden;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ============================================
   App Container - Full Viewport
   ============================================ */

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ============================================
   Hero Background - Left Side
   ============================================ */

.hero-background {
    position: relative;
    flex: 1;
    min-width: 0;
    background: var(--bg-secondary);
    overflow: hidden;
}

.character-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: opacity 0.4s ease-in-out;
}

.character-image.fade-out {
    opacity: 0;
}

.character-image.back {
    z-index: 0;
}

.character-image.front {
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.3) 8%,
        transparent 15%
    );
    pointer-events: none;
}

.hero-content {
    position: absolute;
    top: var(--spacing-xl);
    left: var(--spacing-xl);
    z-index: 2;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.logo-icon {
    color: var(--accent-primary);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.status-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

/* ============================================
   Converter Panel - Right Side
   ============================================ */

.converter-panel {
    width: 480px;
    flex-shrink: 0;
    height: 100vh;
    overflow-y: auto;
    background: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
}

.panel-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.panel-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.panel-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.converter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    flex: 1;
}

/* Form Groups */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Select Input */
.select-wrapper {
    position: relative;
}

.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 2.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font-body);
    cursor: pointer;
    appearance: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-select:hover {
    border-color: var(--border-highlight);
}

.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.select-arrow {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 0.8rem;
}

/* Drop Zone */
.drop-zone {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--bg-tertiary);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent-primary);
    background: rgba(201, 162, 39, 0.05);
}

.file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.drop-zone-content {
    pointer-events: none;
}

.drop-icon {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.drop-zone:hover .drop-icon {
    color: var(--accent-primary);
}

.drop-text {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.drop-subtext {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.browse-link {
    color: var(--accent-primary);
    text-decoration: underline;
}

/* File Preview */
.file-preview {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

.file-preview.hidden {
    display: none;
}

.file-icon {
    font-size: 1.25rem;
}

.file-name {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.clear-file {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color var(--transition-fast);
}

.clear-file:hover {
    color: var(--error);
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

/* Textarea */
.form-textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    line-height: 1.4;
    resize: vertical;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.form-textarea:hover {
    border-color: var(--border-highlight);
}

.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.form-textarea.context-textarea {
    min-height: 70px;
}

/* Convert Button */
.convert-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--bg-primary);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    margin-top: auto;
}

.convert-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.convert-button:active {
    transform: translateY(0);
}

.convert-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.button-icon {
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

.convert-button:hover .button-icon {
    transform: translateX(3px);
}

/* Progress Section */
.progress-section {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

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

.progress-bar {
    height: 4px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width var(--transition-normal);
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Footer */
.panel-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ============================================
   Login Page
   ============================================ */

.login-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.login-hero {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.login-hero .character-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.login-hero .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        transparent 50%,
        var(--bg-primary) 100%
    );
}

.login-panel {
    width: 400px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--bg-primary);
    border-left: 1px solid var(--border-color);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header .logo {
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

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

.login-error {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--error);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--error);
    font-size: 0.9rem;
    text-align: center;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-body);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:hover {
    border-color: var(--border-highlight);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

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

.login-button {
    width: 100%;
}

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

@media (max-width: 1024px) {
    .converter-panel {
        width: 420px;
    }
}

@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }

    .hero-background {
        height: 35vh;
        flex: none;
    }

    .hero-overlay {
        background: linear-gradient(
            180deg,
            transparent 0%,
            transparent 50%,
            var(--bg-primary) 100%
        );
    }

    .hero-content {
        bottom: auto;
        top: var(--spacing-lg);
        left: var(--spacing-lg);
    }

    .converter-panel {
        width: 100%;
        height: auto;
        flex: 1;
        border-left: none;
        border-top: 1px solid var(--border-color);
        overflow-y: auto;
    }

    .login-container {
        flex-direction: column;
    }

    .login-hero {
        height: 40vh;
        flex: none;
    }

    .login-hero .hero-overlay {
        background: linear-gradient(
            180deg,
            transparent 0%,
            transparent 50%,
            var(--bg-primary) 100%
        );
    }

    .login-panel {
        width: 100%;
        flex: 1;
        border-left: none;
    }
}

@media (max-width: 480px) {
    .hero-background {
        height: 30vh;
    }

    .logo {
        font-size: 1.25rem;
    }

    .converter-panel {
        padding: var(--spacing-md);
    }

    .form-select,
    .form-textarea,
    .form-input {
        font-size: 16px; /* Prevent iOS zoom */
    }
}

/* ============================================
   Animation States
   ============================================ */

.character-image.transitioning {
    opacity: 0;
}

/* Processing state animations */
.processing .status-indicator {
    background: var(--accent-primary);
}

.processing .hero-background::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, var(--accent-glow) 0%, transparent 70%);
    animation: processing-pulse 2s ease-in-out infinite;
    pointer-events: none;
}

@keyframes processing-pulse {
    0%, 100% { opacity: 0; }
    50% { opacity: 0.3; }
}