/**
 * Web Tools Collection - Enhanced Edition
 * Modern, Professional Design System
 */

/* ==================== CSS Variables & Theme System ==================== */
:root {
    /* Light Theme Colors - Indigo Theme */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-secondary: #a855f7;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Neutral Colors - Light Mode */
    --color-bg-primary: #f8fafc;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f1f5f9;
    --color-text-primary: #0f172a;
    --color-text-secondary: #64748b;
    --color-text-tertiary: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* Card & Shadow - Enhanced */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --card-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --card-shadow-glow: 0 0 15px rgba(99, 102, 241, 0.2);

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

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

    /* Transitions */
    --transition-base: all 0.2s ease-in-out;
    --transition-fast: all 0.15s ease-in-out;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-border: #334155;
    --color-border-light: #475569;

    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

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

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Material Icons Support */
.material-icons {
    font-family: 'Material Icons';
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

/* ==================== Header & Navigation ==================== */
.header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-base);
}

[data-theme="dark"] .header {
    background-color: rgba(15, 23, 42, 0.8);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    letter-spacing: -0.025em;
}

.nav-brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
}

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

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

/* Theme Toggle */
.theme-toggle {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.theme-toggle:hover {
    background: var(--color-bg-tertiary);
    transform: scale(1.05);
}

/* ==================== Container & Layout ==================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-sm {
    max-width: 768px;
}

.container-lg {
    max-width: 1536px;
}

/* ==================== Hero Section ==================== */
.hero {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    background: var(--color-bg-primary);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
    padding-bottom: 0.25rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-badges {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== Cards & Tool Cards ==================== */
.card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--card-shadow);
    transition: var(--transition-base);
}

.card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
    padding: var(--space-2xl) 0;
}

.tool-card {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    border-color: rgba(99, 102, 241, 0.5);
}

[data-theme="dark"] .tool-card:hover {
    border-color: rgba(99, 102, 241, 0.5);
}

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

.tool-icon-container {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
}

.tool-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-md);
    color: white;
    font-size: 1.5rem;
}

.tool-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    margin-top: var(--space-sm);
    color: var(--color-text-primary);
    transition: var(--transition-fast);
}

.tool-card:hover .tool-title {
    color: var(--color-primary);
}

.tool-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
    font-size: 0.875rem;
    flex-grow: 1;
}

.tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.feature-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.feature-badge:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

[data-theme="dark"] .feature-badge {
    background: rgba(51, 65, 85, 0.5);
    border-color: rgba(71, 85, 105, 0.8);
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.5rem var(--space-lg);
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

[data-theme="dark"] .btn-primary {
    box-shadow: none;
}

/* Launch Tool Button with Rocket Animation */
.btn-launch {
    background: linear-gradient(to right, #4f46e5, #6366f1, #7c3aed);
    font-weight: 500;
    letter-spacing: 0.025em;
    border-radius: var(--radius-xl);
    padding: 0.7em 1.3em 0.7em 1em;
    color: white !important;
}

.btn-launch svg {
    margin-right: 0.5rem;
    transform: rotate(-45deg);
    transition: transform 0.5s cubic-bezier(0.76, 0, 0.24, 1);
    flex-shrink: 0;
}

.btn-launch svg path {
    fill: white;
}

.btn-launch > span {
    transition: transform 0.5s cubic-bezier(0.76, 0, 0.24, 1);
    color: white;
}

.btn-launch:hover {
    background: linear-gradient(to right, #4338ca, #4f46e5, #6d28d9);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -4px rgba(99, 102, 241, 0.4);
    color: white !important;
}

.btn-launch:hover svg {
    transform: translateX(5px) rotate(0deg);
}

.btn-launch:hover > span {
    transform: translateX(7px);
}

[data-theme="dark"] .btn-launch {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    color: white !important;
}

[data-theme="dark"] .btn-launch:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
}

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

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.125rem;
}

/* ==================== Forms ==================== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ==================== Utilities ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.p-1 { padding: var(--space-sm); }
.p-2 { padding: var(--space-md); }
.p-3 { padding: var(--space-lg); }
.p-4 { padding: var(--space-xl); }

/* ==================== Footer ==================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-2xl);
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    text-align: center;
}

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

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

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

    .nav-links {
        gap: var(--space-md);
    }

    .nav-container {
        flex-direction: column;
        gap: var(--space-md);
    }

    .hero-badges {
        flex-direction: column;
        align-items: stretch;
    }

    .feature-badge {
        justify-content: center;
        padding: var(--space-sm) var(--space-md);
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

.spinner {
    animation: spin 1s linear infinite;
}

/* Badge Styles */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 0.25rem;
    line-height: 1;
}

.badge-premium {
    background: linear-gradient(135deg, #a855f7, #ec4899);
    color: white;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.625rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-free {
    background: #6B7280;
    color: white;
}

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

.badge-success {
    background: #10B981;
    color: white;
}

.badge-warning {
    background: #F59E0B;
    color: white;
}