:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #0077C0 0%, #004A8D 100%);
    --primary-blue: #0077C0;
    --secondary-blue: #004A8D;
    --charcoal: #333333;
    --text-main: #4A4A4A;
    --text-muted: #757575;
    --white: #ffffff;
    --light-bg: #f8faff;
    --accent-blue: #e3f2fd;
    --success: #2e7d32;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-standard: 0.3s ease;

    /* Spacing */
    --section-padding: 80px 0;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--charcoal);
    font-weight: 700;
    line-height: 1.2;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-standard);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    opacity: 0.95;
}

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

.btn-outline:hover {
    background: var(--accent-blue);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.9rem;
}

/* --- Navbar --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 15px 0;
    transition: var(--transition-standard);
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-md);
}

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

.logo img {
    height: 50px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links li a {
    font-weight: 500;
    color: var(--charcoal);
    position: relative;
}

.nav-links li a:hover {
    color: var(--primary-blue);
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition-standard);
}

.nav-links li a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero Section --- */
.hero {
    padding: 180px 0 100px;
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9)), url('../img/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 35px;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

/* --- Section Titles --- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.section-header .underline {
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 0 auto;
    border-radius: 2px;
}

/* --- Services Grid --- */
.services-section {
    padding: var(--section-padding);
    background: var(--light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-standard);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
}

.service-card h3 {
    margin-bottom: 15px;
}

/* --- Stats Section --- */
.stats {
    padding: 60px 0;
    background: var(--primary-gradient);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    text-align: center;
    gap: 40px;
}

.stat-item h2 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 10px;
}

/* --- About Preview --- */
.about-preview {
    padding: var(--section-padding);
}

.about-flex {
    display: flex;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
}

.about-image {
    flex: 1;
    min-width: 400px;
}

.about-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.about-text {
    flex: 1;
    min-width: 400px;
}

.about-text h2 {
    margin-bottom: 20px;
}

/* --- Contact Section --- */
.contact-section {
    padding: var(--section-padding);
    background: var(--white);
}

.contact-flex {
    display: flex;
    gap: 60px;
}

.contact-info {
    flex: 1;
}

.contact-form-container {
    flex: 1.5;
    background: var(--light-bg);
    padding: 40px;
    border-radius: 12px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-family: inherit;
}

/* --- Footer --- */
.footer {
    background: #1a1a1a;
    color: #aeaeae;
    padding: 80px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
}

/* --- Dropdown Menu --- */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 280px;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    padding: 15px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    width: 100%;
    padding: 0;
}

.dropdown-menu li a {
    padding: 10px 25px;
    display: block;
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 400;
}

.dropdown-menu li a:hover {
    background: var(--accent-blue);
    color: var(--primary-blue);
    padding-left: 30px;
}

/* Mobile Dropdown Adjustments */
@media (max-width: 768px) {
    .nav-links.active .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        transform: none;
        padding-left: 20px;
        display: none;
        /* Controlled by JS or click */
    }

    .nav-links.active .dropdown.open .dropdown-menu {
        display: block;
    }
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.8rem;
    }

    .about-image,
    .about-text {
        min-width: 100%;
    }

    .contact-flex {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* Add JS toggle for mobile */
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 3px #999;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.whatsapp-float:hover {
    background-color: #128c7e;
    transform: scale(1.1);
}

/* --- Tax Knowledge Hub (Flashcards) --- */
.tax-hub {
    padding: var(--section-padding);
    background: var(--light-bg);
}

.flashcards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.flashcard-container {
    perspective: 1000px;
    height: 250px;
    cursor: pointer;
}

.flashcard {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flashcard-container:hover .flashcard,
.flashcard-container.flipped .flashcard {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.flashcard-front {
    background-color: var(--white);
    color: var(--charcoal);
    border: 1px solid var(--accent-blue);
}

.flashcard-front i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.flashcard-back {
    background: var(--primary-gradient);
    color: var(--white);
    transform: rotateY(180deg);
}

.flashcard h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.flashcard-back p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* --- Advisor Flip Cards --- */
.advisor-card-container {
    perspective: 1000px;
    height: 400px;
    cursor: pointer;
}

.advisor-card {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.advisor-card-container:hover .advisor-card,
.advisor-card-container.flipped .advisor-card {
    transform: rotateY(180deg);
}

.advisor-front,
.advisor-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.advisor-front {
    background: var(--primary-gradient);
    color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    text-align: center;
    z-index: 2;
    transform: rotateY(0deg);
}

.advisor-front h3 {
    color: white;
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.advisor-front .role {
    font-weight: 600;
    font-size: 0.9rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.advisor-back {
    background: var(--white);
    transform: rotateY(180deg);
    overflow: hidden;
    z-index: 1;
}

.advisor-back img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.advisor-bio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
    color: white;
    text-align: center;
    font-size: 0.9rem;
    line-height: 1.4;
    z-index: 3;
}