/* ============================================
   VIRTUAL USTAD ACADEMY - MAIN STYLES
   ============================================ */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    --primary: #151548;
    --primary-dark: #0c0c2e;
    --secondary: #25256B;
    --accent: #F4B942;
    --accent-light: #f8d07a;
    --light-bg: #F7F8FC;
    --white: #FFFFFF;
    --dark-text: #1F2937;
    --muted-text: #6B7280;
    --border-color: #E5E7EB;
    
    --shadow-sm: 0 2px 8px rgba(21, 21, 72, 0.08);
    --shadow-md: 0 4px 20px rgba(21, 21, 72, 0.12);
    --shadow-lg: 0 10px 40px rgba(21, 21, 72, 0.15);
    --shadow-xl: 0 20px 60px rgba(21, 21, 72, 0.2);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-primary: 'Inter', sans-serif;
    --font-display: 'Playfair Display', serif;
}

/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-text);
    background: var(--white);
    overflow-x: hidden;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

.section-tag {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--muted-text);
    max-width: 600px;
    margin: 0 auto 2rem auto;
}

/* ============================================
   PRELOADER
   ============================================ */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.5s ease;
}

#preloader.hide {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--light-bg);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 2px 30px rgba(21, 21, 72, 0.1);
    padding: 0.25rem 0;
}

.header .navbar {
    padding: 0.5rem 0;
}

.header .navbar-brand {
    padding: 0;
}

.header .logo {
    height: 100px !important;
    width: auto;
    background: silver;
    transition: var(--transition);
}

.header.scrolled .logo {
    /*height: 42px;*/
    background: none;

}

.header .navbar-nav .nav-link {
    color: var(--white);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    transition: var(--transition);
    position: relative;
}

.header.scrolled .navbar-nav .nav-link {
    color: var(--dark-text);
}

.header .navbar-nav .nav-link:hover {
    color: var(--accent);
}

.header .navbar-nav .nav-link.active {
    color: var(--accent);
}

.header .navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
    transform: translateX(-50%);
}

.header .navbar-nav .nav-link:hover::after,
.header .navbar-nav .nav-link.active::after {
    width: 60%;
}

/* Special Nav Buttons */
.nav-link.btn-free-trial {
    background: var(--accent);
    color: var(--primary) !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.nav-link.btn-free-trial:hover {
    background: #e0a832;
    color: var(--primary) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(244, 185, 66, 0.4);
}

.nav-link.btn-free-trial::after {
    display: none !important;
}

.nav-link.btn-portal {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white) !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: 50px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.header.scrolled .nav-link.btn-portal {
    background: var(--primary);
    color: var(--white) !important;
    border-color: var(--primary);
}

.nav-link.btn-portal:hover {
    background: var(--accent) !important;
    color: var(--primary) !important;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(244, 185, 66, 0.3);
}

.nav-link.btn-portal::after {
    display: none !important;
}

/* Mobile Nav Toggle */
.navbar-toggler {
    border: none;
    padding: 0.5rem;
    background: transparent;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.header.scrolled .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(21,21,72,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary-custom {
    display: inline-block;
    background: var(--accent);
    color: var(--primary) !important;
    font-weight: 600;
    padding: 0.875rem 2.5rem;
    border-radius: 50px;
    border: none;
    transition: var(--transition);
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
}

.btn-primary-custom:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(244, 185, 66, 0.4);
    color: var(--primary) !important;
    background: #e0a832;
}

.btn-secondary-custom {
    display: inline-block;
    background: transparent;
    color: var(--white) !important;
    font-weight: 600;
    padding: 0.875rem 2.5rem;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
}

.btn-secondary-custom:hover {
    background: var(--white);
    color: var(--primary) !important;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
    border-color: var(--white);
}

.btn-outline-custom {
    display: inline-block;
    background: transparent;
    color: var(--primary) !important;
    font-weight: 600;
    padding: 0.875rem 2.5rem;
    border-radius: 50px;
    border: 2px solid var(--primary);
    transition: var(--transition);
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
}

.btn-outline-custom:hover {
    background: var(--primary);
    color: var(--white) !important;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(21, 21, 72, 0.2);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="10" cy="10" r="2" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="20" r="3" fill="rgba(255,255,255,0.05)"/><circle cx="50" cy="90" r="4" fill="rgba(255,255,255,0.05)"/><circle cx="30" cy="50" r="2" fill="rgba(255,255,255,0.03)"/><circle cx="80" cy="70" r="3" fill="rgba(255,255,255,0.03)"/></svg>');
    background-size: 100px 100px;
    opacity: 0.5;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    color: var(--white);
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-content h1 .highlight {
    color: var(--accent);
}

.hero-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.2rem;
    line-height: 1.8;
    max-width: 550px;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero-floating-shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(244, 185, 66, 0.1);
    animation: float 6s ease-in-out infinite;
}

.hero-floating-shape-1 {
    width: 300px;
    height: 300px;
    top: -50px;
    right: -100px;
}

.hero-floating-shape-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: -50px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

/* ============================================
   SECTION STYLES
   ============================================ */
.section-padding {
    padding: 80px 0;
}

.section-padding-lg {
    padding: 100px 0;
}

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

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

/* ============================================
   CARDS
   ============================================ */
.card-custom {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    border: 1px solid rgba(21, 21, 72, 0.06);
}

.card-custom:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: rgba(244, 185, 66, 0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1.25rem;
    transition: var(--transition);
}

.card-custom:hover .card-icon {
    background: var(--accent);
    color: var(--white);
    transform: scale(1.1);
}

.card-custom h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.card-custom p {
    color: var(--muted-text);
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* ============================================
   WHY CHOOSE US
   ============================================ */
.why-section .card-custom {
    padding: 2rem 1.5rem;
}

/* ============================================
   LANGUAGE CARDS
   ============================================ */
.language-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
    cursor: pointer;
}

.language-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.language-flag {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    background: var(--light-bg);
    transition: var(--transition);
}

.language-card:hover .language-flag {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(21, 21, 72, 0.1);
}

.language-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.language-card p {
    font-size: 0.9rem;
    color: var(--muted-text);
    margin-bottom: 0;
}

/* ============================================
   TUTOR CARDS
   ============================================ */
.tutor-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
    height: 100%;
}

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

.tutor-card .tutor-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
    background: var(--light-bg);
}

.tutor-card .tutor-info {
    padding: 1.5rem;
}

.tutor-card .tutor-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.tutor-card .tutor-subject {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.tutor-card .tutor-bio {
    color: var(--muted-text);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.tutor-card .tutor-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.tutor-card .tutor-meta span {
    font-size: 0.85rem;
    color: var(--muted-text);
}

.tutor-card .tutor-meta i {
    margin-right: 0.5rem;
    color: var(--accent);
}

/* ============================================
   TEAM CARDS
   ============================================ */
.team-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
    height: 100%;
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.team-card .team-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: var(--light-bg);
}

.team-card .team-info {
    padding: 1.5rem;
}

.team-card .team-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.team-card .team-role {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.team-card .team-bio {
    color: var(--muted-text);
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.6;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="10" cy="10" r="2" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="20" r="3" fill="rgba(255,255,255,0.05)"/><circle cx="50" cy="90" r="4" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100px 100px;
    opacity: 0.3;
}

.cta-section .container {
    position: relative;
    z-index: 2;
}

.cta-section h2 {
    color: var(--white);
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.2rem;
    max-width: 500px;
    margin: 0 auto 2rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-info-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
    height: 100%;
}

.contact-info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-info-card .contact-icon {
    width: 56px;
    height: 56px;
    background: rgba(244, 185, 66, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.contact-info-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.contact-info-card p,
.contact-info-card a {
    color: var(--muted-text);
    margin-bottom: 0;
}

.contact-info-card a:hover {
    color: var(--accent);
}

/* ============================================
   FORMS
   ============================================ */
.form-control-custom {
    display: block;
    width: 100%;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--dark-text);
    background-color: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.form-control-custom:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(244, 185, 66, 0.15);
    outline: none;
}

.form-control-custom::placeholder {
    color: var(--muted-text);
    opacity: 0.7;
}

.form-label-custom {
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-select-custom {
    display: block;
    width: 100%;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--dark-text);
    background-color: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px 12px;
}

.form-select-custom:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(244, 185, 66, 0.15);
    outline: none;
}

/* ============================================
   ALERT / MESSAGE BOXES
   ============================================ */
.alert-custom {
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-sm);
    border: none;
    font-weight: 500;
}

.alert-custom-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid #10b981;
}

.alert-custom-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--primary);
    color: rgba(255, 255, 255, 0.85);
    padding: 60px 0 0;
}

.footer-widget {
    margin-bottom: 2rem;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 1.5rem;
    position: relative;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

.footer-text {
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.footer-links li {
    margin-bottom: 0.6rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a i {
    font-size: 0.6rem;
    margin-right: 0.5rem;
    color: var(--accent);
}

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

.footer-contact .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.footer-contact .contact-item i {
    color: var(--accent);
    margin-top: 4px;
    font-size: 0.9rem;
}

.footer-contact .contact-item a {
    color: rgba(255, 255, 255, 0.75);
}

.footer-contact .contact-item a:hover {
    color: var(--accent);
}

.footer-social {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    transition: var(--transition);
    font-size: 0.9rem;
}

.social-link:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
    margin-top: 2rem;
}

.copyright-text {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0;
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   WHATSAPP FLOATING BUTTON
   ============================================ */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25d366;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: var(--transition);
    z-index: 999;
    animation: pulse-whatsapp 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    color: var(--white);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.5);
}

@keyframes pulse-whatsapp {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1199px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    .hero-content h1 { font-size: 3.5rem; }
}

@media (max-width: 991px) {
    /* Navigation */
    .header .navbar-collapse {
        background: var(--white);
        padding: 1.5rem 2rem;
        border-radius: var(--radius-md);
        margin-top: 1rem;
        box-shadow: var(--shadow-lg);
    }
    
    .header .navbar-nav .nav-link {
        color: var(--dark-text) !important;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .header .navbar-nav .nav-link::after {
        display: none;
    }
    
    .nav-link.btn-free-trial,
    .nav-link.btn-portal {
        border: none !important;
        text-align: center;
        margin: 0.5rem 0;
    }
    
    .nav-link.btn-free-trial {
        background: var(--accent) !important;
        color: var(--primary) !important;
    }
    
    .nav-link.btn-portal {
        background: var(--primary) !important;
        color: var(--white) !important;
        border: none !important;
    }
    
    .header.scrolled .nav-link.btn-portal {
        background: var(--primary) !important;
        color: var(--white) !important;
    }
    
    /* Hero */
    .hero-content h1 {
        font-size: 2.75rem;
    }
    
    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }
    
    .hero-image {
        margin-top: 2rem;
    }
    
    /* Section */
    .section-padding {
        padding: 60px 0;
    }
    
    .section-padding-lg {
        padding: 80px 0;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    /* CTA */
    .cta-section h2 {
        font-size: 2.25rem;
    }
    
    .cta-section p {
        font-size: 1rem;
    }
}

@media (max-width: 767px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    .section-title { font-size: 2rem; }
    
    /* Hero */
    .hero-content h1 {
        font-size: 2.25rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        text-align: center;
    }
    
    .hero-floating-shape {
        display: none;
    }
    
    /* Cards */
    .card-custom,
    .tutor-card,
    .team-card,
    .language-card {
        margin-bottom: 1.5rem;
    }
    
    /* Footer */
    .footer {
        padding: 40px 0 0;
    }
    
    .footer-widget {
        margin-bottom: 1.5rem;
    }
    
    .footer-title {
        margin-bottom: 1rem;
    }
    
    /* Back to Top */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
    
    /* WhatsApp Float */
    .whatsapp-float {
        bottom: 20px;
        left: 20px;
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    body {
        font-size: 0.95rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    .section-title { font-size: 1.75rem; }
    
    /* Hero */
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero {
        padding: 80px 0 40px;
    }
    
    /* Section */
    .section-padding {
        padding: 40px 0;
    }
    
    .section-padding-lg {
        padding: 60px 0;
    }
    
    /* CTA */
    .cta-section {
        padding: 60px 0;
    }
    
    .cta-section h2 {
        font-size: 1.75rem;
    }
    
    /* Forms */
    .form-control-custom {
        padding: 0.6rem 1rem;
        font-size: 0.95rem;
    }
    
    /* Tutor Cards */
    .tutor-card .tutor-image {
        height: 220px;
    }
    
    .team-card .team-image {
        height: 220px;
    }
}

@media (max-width: 375px) {
    .hero-content h1 {
        font-size: 1.75rem;
    }
    
    .btn-primary-custom,
    .btn-secondary-custom,
    .btn-outline-custom {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-accent {
    color: var(--accent);
}

.text-primary-custom {
    color: var(--primary);
}

.bg-primary-custom {
    background: var(--primary);
}

.bg-accent {
    background: var(--accent);
}

.shadow-custom {
    box-shadow: var(--shadow-sm);
}

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

.rounded-custom {
    border-radius: var(--radius-md);
}

.rounded-custom-lg {
    border-radius: var(--radius-lg);
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* ============================================
   ANIMATION HELPERS
   ============================================ */
[data-aos] {
    pointer-events: none;
}

[data-aos].aos-animate {
    pointer-events: auto;
}

/* ============================================
   PAGE HERO / BANNER
   ============================================ */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 160px 0 80px;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="10" cy="10" r="2" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="20" r="3" fill="rgba(255,255,255,0.05)"/><circle cx="50" cy="90" r="4" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100px 100px;
    opacity: 0.3;
}

.page-hero .container {
    position: relative;
    z-index: 2;
}

.page-hero h1 {
    color: var(--white);
    font-family: var(--font-display);
    font-weight: 700;
}

.page-hero p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   ABOUT / MISSION VISION
   ============================================ */
.mission-vision-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(21, 21, 72, 0.06);
    transition: var(--transition);
    height: 100%;
    text-align: center;
}

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

.mission-vision-card .mv-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.mission-vision-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.mission-vision-card p {
    color: var(--muted-text);
    margin-bottom: 0;
    font-size: 1rem;
}

/* ============================================
   CEO PROFILE
   ============================================ */
.ceo-profile {
    background: var(--light-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.ceo-image {
    width: 100%;
    height: 100%;
    min-height: 400px;
    object-fit: cover;
    background: var(--light-bg);
}

.ceo-content {
    padding: 2.5rem;
}

.ceo-badge {
    display: inline-block;
    background: var(--accent);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 1rem;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.ceo-content h2 {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.ceo-content .ceo-title {
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 1rem;
}

.ceo-content .ceo-bio {
    color: var(--dark-text);
    line-height: 1.8;
}

.ceo-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.ceo-highlight-item {
    background: var(--white);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    text-align: center;
    box-shadow: var(--shadow-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
}

.ceo-highlight-item i {
    color: var(--accent);
    margin-right: 0.5rem;
}

/* ============================================
   SAMPLE LECTURE CARDS
   ============================================ */
.lecture-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
    height: 100%;
}

.lecture-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.lecture-card .video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    background: var(--primary);
}

.lecture-card .video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.lecture-card .lecture-info {
    padding: 1.5rem;
}

.lecture-card .lecture-subject {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
}

.lecture-card .lecture-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.lecture-card .lecture-tutor {
    color: var(--muted-text);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ============================================
   GLOBAL REACH
   ============================================ */
.country-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
}

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

.country-card .country-flag {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    display: block;
}

.country-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0;
    color: var(--primary);
}

/* ============================================
   PROGRESS REPORT CARDS
   ============================================ */
.progress-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(21, 21, 72, 0.06);
}

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

.progress-card .progress-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.progress-card h5 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0;
    color: var(--primary);
}

/* ============================================
   WEEKLY TEST SECTION
   ============================================ */
.weekly-test-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(21, 21, 72, 0.06);
}

.weekly-test-card .test-icon {
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.weekly-test-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.weekly-test-card p {
    color: var(--muted-text);
    margin-bottom: 0;
}

/* ============================================
   TUTOR-PROFILE PAGE SPECIFIC
   ============================================ */
.tutor-profile-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 160px 0 80px;
    position: relative;
    overflow: hidden;
}

.tutor-profile-hero .tutor-profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.3);
    margin-bottom: 1.5rem;
}

.tutor-profile-hero h1 {
    color: var(--white);
    font-family: var(--font-display);
    font-weight: 700;
}

.tutor-profile-hero .tutor-subject {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 500;
}

.tutor-profile-hero .tutor-meta-item {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
}

.tutor-profile-hero .tutor-meta-item i {
    color: var(--accent);
    margin-right: 0.5rem;
}

/* ============================================
   PORTAL PAGE
   ============================================ */
.portal-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(21, 21, 72, 0.06);
    max-width: 600px;
    margin: 0 auto;
}

.portal-card .portal-icon {
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.portal-card h2 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--primary);
}

.portal-card p {
    color: var(--muted-text);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}