:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --muted-text: #7f8c8d;
    --border-color: #bdc3c7;
    --white: #ffffff;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--light-bg);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
    margin-bottom: 1rem;
}

.subtitle {
    color: var(--muted-text);
    font-size: 0.9rem;
    font-weight: normal;
    margin: 0;
}

.help-text {
    color: var(--muted-text);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.app-header {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
}

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

.logo h1 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.logo .subtitle {
    font-size: 0.85rem;
}

.app-main {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.content-area {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.workflow-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0;
    position: relative;
}

.workflow-steps::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--border-color);
    z-index: 0;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    background: var(--light-bg);
    padding: 0 1rem;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--muted-text);
    margin-bottom: 0.5rem;
}

.step-label {
    font-size: 0.9rem;
    color: var(--muted-text);
}

.step.active .step-number {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
}

.step.active .step-label {
    color: var(--accent-color);
    font-weight: 600;
}

.step.completed .step-number {
    background: var(--success-color);
    border-color: var(--success-color);
    color: var(--white);
}

.step.completed .step-label {
    color: var(--success-color);
}

.project-info {
    margin: 2rem 0;
    padding: 1rem;
    background: var(--white);
    border-left: 4px solid var(--accent-color);
    border-radius: 4px;
}

.project-info h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.25rem;
}

.project-meta {
    display: flex;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--muted-text);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-text);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.upload-zone {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-zone:hover {
    border-color: var(--accent-color);
    background: rgba(52, 152, 219, 0.05);
}

.upload-zone.dragover {
    border-color: var(--accent-color);
    background: rgba(52, 152, 219, 0.1);
}

.upload-zone-content {
    width: 100%;
}

.upload-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    color: var(--muted-text);
}

.upload-label {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: var(--muted-text);
}

.upload-preview {
    position: relative;
    width: 100%;
    height: 100%;
}

.upload-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: 4px;
    object-fit: contain;
}

.btn-remove {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--danger-color);
    color: var(--white);
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    transition: transform 0.2s;
}

.btn-remove:hover {
    transform: scale(1.1);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

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

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

.btn-primary:hover:not(:disabled) {
    background: #2980b9;
}

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

.btn-secondary:hover:not(:disabled) {
    background: #2c3e50;
}

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

.btn-success:hover:not(:disabled) {
    background: #229954;
}

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

.btn-warning:hover:not(:disabled) {
    background: #d68910;
}

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

.btn-danger:hover:not(:disabled) {
    background: #c0392b;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

.alphabet-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.letter-cell {
    aspect-ratio: 1;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.letter-cell:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-hover);
    transform: scale(1.05);
}

.letter-cell.generated {
    border-color: var(--success-color);
}

.letter-cell.excluded {
    opacity: 0.3;
    border-color: var(--danger-color);
}

.letter-char {
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--muted-text);
    margin-bottom: 0.25rem;
}

.letter-svg {
    width: 100%;
    height: 100%;
    flex-grow: 1;
}

.letter-svg svg {
    width: 100%;
    height: 100%;
}

.letter-source {
    font-size: 0.7rem;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    background: var(--white);
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.alert-error {
    background: #fadbd8;
    color: #a94442;
    border: 1px solid #ebccd1;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.loading {
    text-align: center;
    padding: 3rem;
    color: var(--muted-text);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.config-panel {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.config-panel h3 {
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
}

.config-panel .form-group small {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.8rem;
    color: var(--muted-text);
}

.letter-cell.from-calque {
    border-color: var(--accent-color);
    background: rgba(52, 152, 219, 0.03);
}

.letter-cell.from-calque .letter-source {
    background: rgba(52, 152, 219, 0.1);
}

.letter-missing {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--border-color);
    font-weight: bold;
}

.generation-progress {
    background: var(--white);
    border-radius: 8px;
}

.generation-progress h3 {
    color: var(--primary-color);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--white);
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

.btn-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--muted-text);
    padding: 0;
    width: 30px;
    height: 30px;
    line-height: 1;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.app-footer {
    background: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: var(--muted-text);
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-box {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-form {
    margin-bottom: 1.5rem;
}

.login-footer {
    text-align: center;
    font-size: 0.85rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .workflow-steps {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .workflow-steps::before {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none; }

.form-hint {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.8rem;
    color: var(--muted-text);
}

.special-chars-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.char-checkbox {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    font-weight: 600;
}

.char-checkbox:hover {
    border-color: var(--accent-color);
    background: rgba(52, 152, 219, 0.05);
}

.char-checkbox input:checked + span {
    color: var(--accent-color);
}

.char-checkbox input {
    width: 14px;
    height: 14px;
}

.target-preview {
    background: #f8f9fa;
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.target-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.target-preview-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--primary-color);
}

.target-preview-progress {
    font-size: 0.85rem;
    color: var(--muted-text);
    background: var(--white);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
}

.target-preview-content {
    background: var(--white);
    border-radius: 6px;
    padding: 1.5rem;
    min-height: 60px;
}

.target-line {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 2px;
    margin-bottom: 0.5rem;
    min-height: 50px;
}

.target-letter {
    display: inline-flex;
    align-items: flex-end;
    justify-content: center;
    width: 40px;
    height: 48px;
    transition: width 0.2s, height 0.2s;
}

.target-letter.initial {
    width: 56px;
    height: 67px;
}

.target-letter.ready svg {
    width: 100%;
    height: 100%;
}

.target-letter.pending {
    color: var(--border-color);
    font-size: 1.5rem;
    font-weight: bold;
    border-bottom: 2px dashed var(--border-color);
}

.target-letter.pending.initial {
    font-size: 2.1rem;
}

.target-space {
    width: 20px;
    display: inline-block;
}

.lettrine-controls {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-top: 0.8rem;
    padding-top: 0.8rem;
    border-top: 1px solid #eee;
    font-size: 0.85rem;
    color: #555;
}

.lettrine-controls label {
    white-space: nowrap;
    font-weight: 600;
}

.lettrine-controls input[type="range"] {
    width: 120px;
    cursor: pointer;
}

.lettrine-controls .lettrine-value {
    min-width: 35px;
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
}

.validation-banner {
    background: #fff3cd;
    border: 2px solid var(--warning-color);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
}

.validation-banner-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.validation-banner-info {
    flex: 1;
    font-size: 0.9rem;
    color: #856404;
}

.validation-banner-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.alphabet-grid-letters {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.letter-badges {
    position: absolute;
    bottom: 3px;
    left: 3px;
    display: flex;
    gap: 2px;
    align-items: center;
}

.letter-ref-badge {
    font-size: 0.55rem;
    background: var(--success-color);
    color: var(--white);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.letter-cell.reference {
    border-color: var(--success-color);
    background: rgba(39, 174, 96, 0.05);
}

@media (max-width: 768px) {
    .validation-banner-content {
        flex-direction: column;
        align-items: flex-start;
    }
    .validation-banner-actions {
        width: 100%;
        justify-content: flex-end;
    }
    .alphabet-grid-letters {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}