/* ==========================================
   CSS Reset & Base Styles
   ========================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ==========================================
   CSS Variables
   ========================================== */
:root {
    /* Colors */
    --primary: #111827;
    --primary-dark: #0f172a;
    --primary-light: #1f2937;
    --secondary: #374151;
    --accent: #4b5563;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    --gradient-secondary: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    --gradient-accent: linear-gradient(135deg, #374151 0%, #4b5563 100%);
    --gradient-hero: linear-gradient(135deg, #111827 0%, #1f2937 50%, #374151 100%);

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 40px rgba(17, 24, 39, 0.2);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 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: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   Typography
   ========================================== */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: linear-gradient(180deg, #f9fafb 0%, #ffffff 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   Container
   ========================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    background: var(--gradient-hero);
    padding: var(--spacing-2xl) 0 5rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.gradient-text {
    color: #ffffff;
    display: inline-block;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

/* ==========================================
   Search Section
   ========================================== */
.search-wrapper {
    margin-top: var(--spacing-xl);
}

.search-container {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    color: var(--gray-400);
    pointer-events: none;
    z-index: 2;
}

.search-input {
    width: 100%;
    padding: 1rem 3.5rem 1rem 3.5rem;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-2xl);
    transition: all var(--transition-base);
    color: var(--gray-800);
    font-family: inherit;
}

.search-input::placeholder {
    color: var(--gray-400);
}

.search-input:focus {
    outline: none;
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.3), var(--shadow-2xl);
    transform: translateY(-2px);
}

.clear-btn {
    position: absolute;
    right: 1rem;
    background: var(--gray-100);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--gray-500);
    transition: all var(--transition-fast);
    z-index: 2;
}

.clear-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
    transform: scale(1.1);
}

.clear-btn.visible {
    display: flex;
}

.search-info {
    text-align: center;
    margin-top: var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ==========================================
   Main Content
   ========================================== */
.main-content {
    padding: var(--spacing-2xl) 0;
    min-height: 60vh;
}

/* ==========================================
   Tools Grid
   ========================================== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    animation: fadeIn var(--transition-slow) ease-in;
}

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

/* Tool Card */
.tool-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--gray-200);
}

.tool-card:hover::before {
    opacity: 1;
}

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

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.tool-badge {
    background: var(--gray-100);
    color: var(--gray-600);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.tool-description {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.tag {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    color: var(--gray-700);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
    transform: translateY(-2px);
}

.tool-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.btn {
    flex: 1;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

/* ==========================================
   Loading, Error, Empty States
   ========================================== */
.loading-state,
.error-state,
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

.loading-state p,
.error-state p,
.empty-state p {
    color: var(--gray-600);
    font-size: 1rem;
    margin-top: var(--spacing-sm);
}

.error-state h3,
.empty-state h3 {
    color: var(--gray-900);
    font-size: 1.5rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.error-icon,
.empty-icon {
    color: var(--gray-400);
    margin: 0 auto;
}

.retry-btn {
    margin-top: var(--spacing-md);
    padding: 0.75rem 2rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.retry-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--white);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-xl) 0 3rem;
    }

    .search-input {
        padding: 0.875rem 3rem 0.875rem 3rem;
        font-size: 0.9375rem;
    }

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

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .tool-card {
        padding: var(--spacing-md);
    }

    .tool-actions {
        flex-direction: column;
    }

    .search-input {
        padding: 0.75rem 2.5rem 0.75rem 2.5rem;
        font-size: 0.875rem;
    }

    .search-icon {
        left: 1rem;
        width: 18px;
        height: 18px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    .hero,
    .footer,
    .search-wrapper {
        display: none;
    }

    .tool-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}

/* ==========================================
   Modal Styles
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    padding: var(--spacing-md);
    overflow-y: auto;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    margin: auto;
    display: flex;
    flex-direction: column;
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-base);
    border: 1px solid var(--gray-100);
    overflow: hidden;
}

.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--gray-700);
    transition: all var(--transition-fast);
    z-index: 10;
    flex-shrink: 0;
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-900);
    transform: scale(1.1);
}

.modal-close:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.modal-content {
    padding: var(--spacing-2xl);
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
}

.modal-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    letter-spacing: -0.02em;
    padding-right: 3rem;
}

.modal-body {
    color: var(--gray-700);
    line-height: 1.7;
}

/* Reuse legal page styles for modal content */
.modal-body .legal-meta,
.modal-body .legal-subtitle {
    color: var(--gray-500);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-100);
}

.modal-body .legal-subtitle {
    font-style: italic;
}

.modal-body section {
    margin-bottom: var(--spacing-xl);
}

.modal-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-100);
}

.modal-body h2:first-of-type {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.modal-body h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.modal-body p {
    color: var(--gray-700);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.modal-body ul,
.modal-body ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.modal-body li {
    color: var(--gray-700);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-xs);
}

.modal-body li::marker {
    color: var(--primary);
}

.modal-body a {
    color: var(--primary);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.modal-body a:hover {
    color: var(--primary-dark);
}

.modal-body .modal-link {
    cursor: pointer;
}

.modal-body strong {
    font-weight: 600;
    color: var(--gray-900);
}

.modal-body .contact-info {
    background: var(--gray-50);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

.modal-body .contact-info p {
    margin-bottom: 0;
}

.modal-body .contact-info strong {
    display: block;
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.modal-body .contact-info a {
    color: var(--primary);
    text-decoration: none;
}

.modal-body .contact-info a:hover {
    text-decoration: underline;
}

/* Modal Responsive Design */
@media (max-width: 768px) {
    .modal-overlay {
        padding: 0;
        align-items: flex-end;
    }

    .modal-container {
        max-width: 100%;
        max-height: 95vh;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        margin: 0;
    }

    .modal-content {
        padding: var(--spacing-lg);
    }

    .modal-title {
        font-size: 1.5rem;
        padding-right: 2.5rem;
    }

    .modal-body h2 {
        font-size: 1.25rem;
    }

    .modal-body h3 {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .modal-content {
        padding: var(--spacing-md);
    }

    .modal-title {
        font-size: 1.25rem;
        padding-right: 2rem;
    }

    .modal-close {
        top: 0.75rem;
        right: 0.75rem;
        width: 36px;
        height: 36px;
    }

    .modal-body .contact-info {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* Modal scrollbar styling */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-sm);
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ==========================================
   Reduced Motion
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .modal-overlay {
        transition: opacity 0.01ms, visibility 0.01ms;
    }

    .modal-container {
        transition: transform 0.01ms;
    }
}