/* ===================================
   Prompt Engineering Generator Styles
   =================================== */

/* CSS Variables for Theming */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;

    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-card: #ffffff;

    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;

    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --transition: all 0.2s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;

    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    width: 28px;
    height: 28px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 3rem 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Card Styles */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sticky {
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.mt-20 {
    margin-top: 2rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tooltip-trigger {
    cursor: help;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.char-counter {
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 0.25rem;
}

/* Task Grid */
.task-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.task-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    cursor: pointer;
    transition: var(--transition);
}

.task-card:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-tertiary);
    transform: translateY(-2px);
}

.task-card.active {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
}

.task-card svg {
    width: 24px;
    height: 24px;
    stroke: var(--text-secondary);
    stroke-width: 2;
}

.task-card.active svg {
    stroke: var(--primary-color);
}

.task-card span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Checkbox & Radio Groups */
.checkbox-group,
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-label,
.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.checkbox-label input,
.radio-label input {
    cursor: pointer;
    width: 16px;
    height: 16px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-secondary-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-secondary);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.btn-secondary-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 0;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn-text:hover {
    color: var(--primary-dark);
}

.chevron-icon {
    width: 16px;
    height: 16px;
    stroke-width: 2;
    transition: transform 0.3s ease;
}

.btn-text.active .chevron-icon {
    transform: rotate(180deg);
}

/* Advanced Section */
.advanced-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.advanced-section.expanded {
    max-height: 1000px;
}

/* Preview Section */
.prompt-preview {
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    min-height: 300px;
    font-size: 0.95rem;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.preview-placeholder {
    color: var(--text-tertiary);
    text-align: center;
    padding: 3rem 1rem;
}

.quality-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.125rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.quality-badge.low {
    background: var(--danger-color);
}

.quality-badge.medium {
    background: var(--warning-color);
}

.quality-badge.high {
    background: var(--success-color);
}

/* Suggestions */
.suggestions-container {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.suggestions-title {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.suggestion-item {
    display: flex;
    align-items: start;
    gap: 0.5rem;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.suggestion-item::before {
    content: '💡';
    flex-shrink: 0;
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* History Section */
.history-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.history-empty {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    padding: 2rem;
}

.history-item {
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.history-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.history-item-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.history-item-preview {
    color: var(--text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Template Section */
.template-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.template-item {
    padding: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.template-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.template-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.template-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Knowledge Section */
.knowledge-section {
    background-color: var(--bg-secondary);
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.knowledge-card {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.knowledge-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.knowledge-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.knowledge-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.knowledge-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* FAQ Section */
.faq-section {
    max-width: 800px;
    margin: 0 auto;
}

.faq-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.accordion-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    padding: 1.25rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.accordion-header:hover {
    background-color: var(--bg-secondary);
}

.accordion-header::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-header::after {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
}

.accordion-content p {
    padding: 0 1.25rem 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

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

.footer-content p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    transform: translateY(100px);
    transition: all 0.3s ease;
    z-index: 1000;
    max-width: 400px;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .sticky {
        position: static;
        max-height: none;
    }

    .knowledge-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .task-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .knowledge-grid {
        grid-template-columns: 1fr;
    }

    .task-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .task-grid {
        grid-template-columns: 1fr;
    }

    .nav-link {
        display: none;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Print Styles */
@media print {
    .navbar,
    .hero,
    .action-buttons,
    .footer,
    .template-grid,
    .knowledge-section {
        display: none;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .prompt-preview {
        border: 1px solid #000;
    }
}