/**
 * CA Sutra - Modern Design System
 * Professional green theme with glassmorphism and smooth animations
 */

/* ==================== CSS Variables ==================== */
:root {
    /* Colors - Professional Green Palette */
    --color-primary: #2E7D32;
    --color-primary-light: #4CAF50;
    --color-primary-dark: #1B5E20;
    --color-accent: #A5D6A7;
    --color-accent-light: #C8E6C9;
    --color-light: #F4FFF4;
    --color-white: #FFFFFF;
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #EEEEEE;
    --color-gray-300: #E0E0E0;
    --color-gray-600: #757575;
    --color-gray-800: #424242;
    --color-gray-900: #212121;
    --color-black: #000000;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2E7D32 0%, #4CAF50 100%);
    --gradient-accent: linear-gradient(135deg, #A5D6A7 0%, #81C784 100%);
    --gradient-hero: linear-gradient(135deg, #1B5E20 0%, #2E7D32 50%, #4CAF50 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(30, 125, 50, 0.9) 0%, rgba(27, 94, 32, 0.95) 100%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* 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: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==================== Global Styles ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--color-light);
    overflow-x: hidden;
}

/* ==================== Typography ==================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

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

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

/* ==================== Header & Navigation ==================== */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: var(--font-weight-bold);
    font-size: 1.5rem;
    color: var(--color-primary);
}

.brand-icon {
    font-size: 1.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav .nav-link {
    color: var(--color-gray-800);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) var(--spacing-sm);
    margin: 0 0.25rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--color-primary);
    background: var(--color-accent-light);
}

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
}

.dropdown-item {
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-accent-light);
    color: var(--color-primary);
}

/* ==================== Buttons ==================== */
.btn {
    font-weight: var(--font-weight-medium);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    transition: var(--transition-normal);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--color-white);
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ==================== Cards ==================== */
.card {
    background: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    overflow: hidden;
}

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

.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

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

.card-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--color-gray-600);
}

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

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.05)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-search {
    max-width: 600px;
    margin: var(--spacing-lg) auto;
}

.hero-search .search-box {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
}

.hero-search .search-box i {
    color: var(--color-gray-600);
    font-size: 1.25rem;
    padding-left: var(--spacing-sm);
}

.hero-search .search-box input {
    border: none;
    outline: none;
    flex: 1;
    font-size: 1rem;
    padding: var(--spacing-xs);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

/* ==================== Snapshot Tiles ==================== */
.snapshot-tiles {
    padding: var(--spacing-xl) 0;
}

.snapshot-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border-left: 4px solid var(--color-primary);
    height: 100%;
}

.snapshot-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--color-primary-light);
}

.snapshot-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-sm);
}

.snapshot-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
}

.snapshot-text {
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

/* ==================== Content Sections ==================== */
.content-section {
    padding: var(--spacing-xl) 0;
}

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

.section-title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--color-gray-600);
    font-size: 1.125rem;
}

/* ==================== Concept Cards ==================== */
.concept-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.concept-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.category-gst {
    background: #E3F2FD;
    color: #1976D2;
}

.category-income-tax {
    background: #F3E5F5;
    color: #7B1FA2;
}

.category-audit {
    background: #FFF3E0;
    color: #F57C00;
}

.category-corporate-law {
    background: #E8F5E9;
    color: #388E3C;
}

.concept-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
}

.concept-summary {
    color: var(--color-gray-600);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.concept-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-gray-600);
    margin-top: auto;
}

.concept-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
}

.tag {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

/* ==================== Badges ==================== */
.badge {
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-medium);
    font-size: 0.875rem;
}

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

.badge-success {
    background: #4CAF50;
    color: var(--color-white);
}

.badge-info {
    background: #2196F3;
    color: var(--color-white);
}

/* ==================== Search Box ==================== */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 1rem;
    color: var(--color-gray-600);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
}

/* ==================== Footer ==================== */
.site-footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.footer-title {
    color: var(--color-white);
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--color-gray-400);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
    padding-left: 0.25rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-gray-800);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.footer-divider {
    border-color: var(--color-gray-800);
    margin: var(--spacing-lg) 0;
}

.footer-bottom {
    text-align: center;
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

.footer-newsletter-text {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-sm);
}

/* ==================== Utility Classes ==================== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-light-green {
    background: var(--color-light);
}

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

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

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

    .section-title {
        font-size: 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.5rem;
    }
}

/* ==================== Animations ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* AOS Animation Overrides */
[data-aos] {
    pointer-events: auto;
}

/* ==================== Insight Cards ==================== */
.insight-card-home {
    transition: all 0.3s ease;
    height: 100%;
}

.insight-card-home:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.insight-meta-home {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--color-gray-200);
    margin-top: auto;
}

.insight-meta-home small {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.insight-meta-home i {
    color: var(--color-primary);
}

/* Insight Cards - General */
.insight-card {
    transition: all 0.3s ease;
}

.insight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.insight-meta {
    padding-top: 1rem;
    border-top: 1px solid var(--color-gray-200);
}

.insight-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.insight-tags .tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--color-light);
    color: var(--color-primary-dark);
    border-radius: 20px;
    border: 1px solid var(--color-accent);
}