/* ============================================
   Coco Elite English Education - Main Stylesheet
   Design System: Elite Professional Aesthetic
   Colors: Boston Red accent + Deep Black + Pearl White
   ============================================ */

/* ---- CSS Custom Properties (Design Tokens) ---- */
:root {
    /* Primary Colors */
    --color-primary: #8B1A1A;          /* Boston University Red (darkened) */
    --color-primary-light: #A52A2A;    /* Lighter accent */
    --color-primary-dark: #6B0F0F;     /* Darker accent */
    --color-primary-glow: rgba(139, 26, 26, 0.15);
    
    /* Neutral Palette */
    --color-black: #0A0A0A;
    --color-dark: #1A1A2E;             /* Deep navy-black */
    --color-charcoal: #2D2D3F;
    --color-gray-dark: #4A4A5A;
    --color-gray: #6B6B7B;
    --color-gray-light: #9B9BAB;
    --color-gray-lighter: #D1D1DB;
    --color-pearl: #F5F5F0;            /* Pearl white */
    --color-white: #FFFFFF;
    --color-cream: #FAF9F6;
    
    /* Accent Colors */
    --color-deloitte-green: #86BC25;
    --color-gold: #C9A84C;
    --color-gold-light: #E8D5A3;
    
    /* Typography */
    --font-serif: 'Playfair Display', 'Georgia', serif;
    --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-inter: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
    --shadow-glow: 0 0 40px rgba(139, 26, 26, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* Layout */
    --max-width: 1200px;
    --nav-height: 72px;
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-dark);
    background-color: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

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

/* ---- Utility Classes ---- */
.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-inter);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    position: relative;
    padding: var(--space-xs) var(--space-lg);
    border: 1px solid var(--color-primary-glow);
    border-radius: var(--radius-full);
    background: var(--color-primary-glow);
}

.section-title {
    font-family: var(--font-sans);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

.title-accent {
    color: var(--color-primary);
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-smooth);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(139, 26, 26, 0.3);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: 0 6px 25px rgba(139, 26, 26, 0.4);
    transform: translateY(-2px);
}

.btn-primary i {
    transition: transform var(--transition-base);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

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

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
    padding: 16px 32px;
    font-size: 1rem;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: all var(--transition-smooth);
    background: rgba(255, 255, 255, 0);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    z-index: 1001;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.logo-divider {
    width: 1px;
    height: 20px;
    background: var(--color-gray-lighter);
}

.logo-subtitle {
    font-family: var(--font-inter);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-gray);
}

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

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-dark);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 20px;
}

.nav-cta {
    background: var(--color-primary) !important;
    color: var(--color-white) !important;
    border-radius: var(--radius-md) !important;
    padding: 10px 20px !important;
    margin-left: var(--space-sm);
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--color-primary-dark) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(139, 26, 26, 0.3);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(5px) translateX(5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-5px) translateX(5px);
}

/* ============================================
   TOP BANNER (replaces Hero)
   ============================================ */
.top-banner {
    padding-top: calc(var(--nav-height) + var(--space-3xl));
    padding-bottom: var(--space-4xl);
    position: relative;
    background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-white) 50%, var(--color-pearl) 100%);
    overflow: hidden;
    text-align: center;
}

.banner-bg-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, var(--color-primary-glow) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 26, 26, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

.banner-bg-pattern::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    border: 1px solid rgba(139, 26, 26, 0.04);
    animation: floatSlow 20s ease-in-out infinite;
}

.banner-bg-pattern::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    border: 1px solid rgba(139, 26, 26, 0.03);
    animation: floatSlow 25s ease-in-out infinite reverse;
}

@keyframes floatSlow {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(20px, -30px) rotate(5deg); }
    66% { transform: translate(-15px, 15px) rotate(-3deg); }
}

.banner-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    position: relative;
    z-index: 1;
}

.banner-content {
    max-width: 800px;
    margin: 0 auto;
}

.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-primary-glow);
    border: 1px solid rgba(139, 26, 26, 0.15);
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
}

.banner-badge i {
    font-size: 0.75rem;
}

.banner-title {
    font-family: var(--font-sans);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.35;
    color: var(--color-dark);
    margin-bottom: var(--space-lg);
}

.banner-title .highlight {
    color: var(--color-primary);
    position: relative;
}

.banner-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    right: 0;
    height: 8px;
    background: linear-gradient(120deg, rgba(139, 26, 26, 0.15) 0%, rgba(139, 26, 26, 0.05) 100%);
    border-radius: 4px;
    z-index: -1;
}

.banner-subtitle {
    font-size: 1rem;
    color: var(--color-gray);
    margin-bottom: var(--space-2xl);
    line-height: 1.9;
}

.banner-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-gray-lighter);
    border-bottom: 1px solid var(--color-gray-lighter);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-top: 4px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-gray-lighter);
}

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

/* ============================================
   ADVANTAGES SECTION
   ============================================ */
.advantages {
    padding: var(--space-5xl) 0;
    background: var(--color-white);
    position: relative;
}

.advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-gray-lighter), transparent);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

.advantage-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-lighter);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.advantage-icon-wrap {
    margin-bottom: var(--space-lg);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: var(--color-primary-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    transition: all var(--transition-smooth);
}

.advantage-icon i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.advantage-card:hover .advantage-icon {
    background: var(--color-primary);
}

.advantage-card:hover .advantage-icon i {
    color: var(--color-white);
}

.advantage-logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.logo-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-badge.szms {
    background: #1a1a2e;
    color: var(--color-white);
}

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

.logo-badge.deloitte {
    background: #86BC25;
    color: var(--color-white);
    font-family: var(--font-inter);
}

.logo-badge.finance {
    background: #1a4b8c;
    color: var(--color-white);
    font-size: 0.72rem;
}

.logo-badge.edu {
    background: var(--color-gold);
    color: var(--color-white);
}

.logo-badge.edu-sub {
    background: var(--color-gray-lighter);
    color: var(--color-gray-dark);
    font-size: 0.72rem;
}

.logo-connector {
    color: var(--color-gray-light);
    font-size: 1rem;
}

.advantage-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-md);
}

.advantage-card p {
    font-size: 0.9rem;
    color: var(--color-gray);
    line-height: 1.7;
    text-align: left;
}

.advantage-card p strong {
    color: var(--color-dark);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    padding: var(--space-5xl) 0;
    background: var(--color-cream);
    position: relative;
}

.about-content-full {
    max-width: 800px;
    margin: 0 auto;
}

.about-content-full .section-tag {
    display: inline-block;
}

.about-content-full .section-title {
    margin-bottom: var(--space-2xl);
}

.about-story {
    margin-bottom: var(--space-2xl);
}

.story-block {
    margin-bottom: var(--space-xl);
    padding-left: var(--space-xl);
    border-left: 2px solid var(--color-gray-lighter);
    transition: border-color var(--transition-base);
}

.story-block:hover {
    border-left-color: var(--color-primary);
}

.story-block h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.story-block h3 i {
    color: var(--color-primary);
    font-size: 0.9rem;
}

.story-block p {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    line-height: 1.85;
}

.story-block strong {
    color: var(--color-dark);
}

.about-credentials {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.credential {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-dark);
    padding: var(--space-sm);
}

.credential i {
    color: var(--color-deloitte-green);
    font-size: 0.9rem;
    margin-top: 3px;
    flex-shrink: 0;
}

/* ============================================
   TEACHING PHILOSOPHY
   ============================================ */
.philosophy {
    padding: var(--space-5xl) 0;
    background: var(--color-dark);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.philosophy::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 26, 26, 0.1), transparent);
}

.philosophy .section-tag {
    background: rgba(139, 26, 26, 0.3);
    border-color: rgba(139, 26, 26, 0.4);
    color: var(--color-primary-light);
}

.philosophy .section-title {
    color: var(--color-white);
}

.philosophy-desc {
    color: var(--color-gray-light) !important;
    max-width: 640px !important;
}

.philosophy-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.philosophy-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--transition-smooth);
}

.philosophy-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(139, 26, 26, 0.3);
    transform: translateY(-6px);
}

.philosophy-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-lg);
    background: rgba(139, 26, 26, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.philosophy-icon i {
    font-size: 1.3rem;
    color: var(--color-primary-light);
}

.philosophy-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.philosophy-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.8;
}

.philosophy-card p strong {
    color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   CURRICULUM SECTION
   ============================================ */
.curriculum {
    padding: var(--space-5xl) 0;
    background: var(--color-white);
}

/* Courses Grid (with real images) */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.course-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-lighter);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.course-cover {
    height: 200px;
    overflow: hidden;
    position: relative;
    background: var(--color-dark);
}

.course-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.course-card:hover .course-cover img {
    transform: scale(1.05);
}

.course-cover-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    color: var(--color-white);
}

.course-cover-inner i {
    font-size: 2rem;
    opacity: 0.8;
}

.cover-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
}

.cover-sub {
    font-size: 0.75rem;
    opacity: 0.6;
    letter-spacing: 2px;
}

.course-info {
    padding: var(--space-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.68rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    width: fit-content;
}

.course-tag.school {
    background: rgba(44, 95, 45, 0.1);
    color: #2C5F2D;
}

.course-tag.cambridge {
    background: rgba(139, 26, 26, 0.1);
    color: var(--color-primary);
}

.course-tag.vocab {
    background: rgba(201, 168, 76, 0.15);
    color: #8B7532;
}

.course-tag.natgeo {
    background: rgba(255, 193, 7, 0.12);
    color: #B8860B;
}

.course-tag.pearson {
    background: rgba(0, 86, 179, 0.1);
    color: #0056B3;
}

.course-tag.oxford {
    background: rgba(0, 47, 108, 0.1);
    color: #002F6C;
}

.course-tag.fce {
    background: rgba(139, 26, 26, 0.12);
    color: var(--color-primary);
}

.course-info h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.course-info p {
    font-size: 0.85rem;
    color: var(--color-gray);
    line-height: 1.7;
    flex: 1;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--space-5xl) 0;
    background: var(--color-cream);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-4xl);
    align-items: start;
}

.contact-info .section-tag {
    display: inline-block;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: var(--space-lg);
}

.contact-desc {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: var(--space-2xl);
}

.contact-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-highlight-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.highlight-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--color-primary-glow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.highlight-icon i {
    color: var(--color-primary);
    font-size: 0.9rem;
}

.contact-highlight-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 2px;
}

.contact-highlight-item p {
    font-size: 0.82rem;
    color: var(--color-gray);
}

/* Form */
.contact-form-wrap {
    position: relative;
}

.consultation-form {
    background: var(--color-white);
    border: 1px solid var(--color-gray-lighter);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.form-header {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-gray-lighter);
}

.form-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.form-header p {
    font-size: 0.82rem;
    color: var(--color-gray);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full-width {
    margin-bottom: var(--space-md);
}

.form-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-dark);
}

.required {
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--color-gray-lighter);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--color-dark);
    transition: all var(--transition-fast);
    background: var(--color-white);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B6B7B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.btn-full {
    margin-top: var(--space-lg);
}

.form-note {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    font-size: 0.75rem;
    color: var(--color-gray-light);
    justify-content: center;
}

.form-note i {
    font-size: 0.7rem;
}

/* Form Success */
.form-success {
    text-align: center;
    padding: var(--space-4xl) var(--space-2xl);
    background: var(--color-white);
    border: 1px solid var(--color-gray-lighter);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.success-animation i {
    font-size: 4rem;
    color: var(--color-deloitte-green);
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.form-success h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin: var(--space-lg) 0 var(--space-md);
}

.form-success p {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-dark);
    color: var(--color-gray-light);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.footer-main {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: var(--space-xl);
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.footer-brand .logo-text {
    color: var(--color-primary-light);
}

.footer-brand .logo-divider {
    background: rgba(255, 255, 255, 0.15);
}

.footer-brand .logo-subtitle {
    color: var(--color-gray);
}

.footer-tagline {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-gray);
}

.footer-links {
    display: flex;
    gap: var(--space-4xl);
}

.footer-col h4 {
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.footer-col a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-bottom: var(--space-md);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-primary-light);
}

.footer-col a i {
    font-size: 0.8rem;
    width: 16px;
}

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

.footer-bottom p {
    font-size: 0.78rem;
    color: var(--color-gray);
}

.elite-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.72rem;
    color: var(--color-gray);
    letter-spacing: 0.5px;
}

.elite-badge i {
    color: var(--color-gold);
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(139, 26, 26, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-smooth);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(139, 26, 26, 0.4);
}

/* ============================================
   MOBILE STICKY CTA BAR
   ============================================ */
.mobile-sticky-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 998;
    padding: 12px 16px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    transform: translateY(100%);
    transition: transform var(--transition-smooth);
}

.mobile-sticky-cta.visible {
    transform: translateY(0);
}

.mobile-cta-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: 14px 24px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 15px rgba(139, 26, 26, 0.3);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.mobile-cta-btn:active {
    transform: scale(0.97);
    background: var(--color-primary-dark);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* --- TABLET (max-width: 1024px) --- */
@media (max-width: 1024px) {
    .advantages-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .philosophy-content {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .contact-info .section-title {
        text-align: center;
    }

    .contact-info .section-tag {
        display: block;
        text-align: center;
    }

    .contact-desc {
        text-align: center;
    }

    .footer-main {
        flex-direction: column;
        gap: var(--space-2xl);
    }

    .footer-links {
        gap: var(--space-2xl);
    }

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

/* --- MOBILE (max-width: 768px) --- */
@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

    /* ---- Mobile Global Touch ---- */
    * {
        -webkit-tap-highlight-color: transparent;
    }

    a, button {
        touch-action: manipulation;
    }

    /* ---- Mobile Navigation ---- */
    .navbar {
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 0 env(safe-area-inset-right, 0px) 0 env(safe-area-inset-left, 0px);
    }

    .nav-container {
        padding: 0 16px;
    }

    .nav-toggle {
        display: flex;
        min-width: 44px;
        min-height: 44px;
        align-items: center;
        justify-content: center;
    }

    .logo-subtitle {
        display: none;
    }

    .logo-divider {
        display: none;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 6px;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-smooth);
        z-index: 1000;
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        font-size: 1.15rem;
        font-weight: 500;
        padding: 14px 32px;
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .nav-cta {
        margin-left: 0 !important;
        margin-top: var(--space-md);
        font-size: 1rem !important;
        padding: 14px 32px !important;
    }

    /* ---- Mobile Top Banner ---- */
    .top-banner {
        padding-top: calc(var(--nav-height) + 24px);
        padding-bottom: var(--space-2xl);
    }

    .banner-container {
        padding: 0 16px;
    }

    .banner-badge {
        font-size: 0.72rem;
        padding: 6px 14px;
        margin-bottom: var(--space-md);
    }

    .banner-title {
        font-size: 1.5rem;
        line-height: 1.35;
        margin-bottom: var(--space-md);
    }

    .banner-subtitle {
        font-size: 0.85rem;
        line-height: 1.7;
        margin-bottom: var(--space-lg);
    }

    .banner-subtitle br {
        display: none;
    }

    .banner-stats {
        gap: 0;
        padding: var(--space-md) 0;
        margin-bottom: var(--space-lg);
    }

    .stat-item {
        flex: 1;
        padding: 0 8px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .stat-suffix {
        font-size: 1rem;
    }

    .stat-label {
        font-size: 0.68rem;
    }

    .stat-divider {
        height: 32px;
    }

    .banner-actions {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }

    .banner-actions .btn {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }

    /* ---- Mobile Section Spacing ---- */
    .advantages,
    .about,
    .philosophy,
    .curriculum,
    .contact {
        padding: var(--space-2xl) 0;
    }

    .section-container {
        padding: 0 16px;
    }

    .section-header {
        margin-bottom: var(--space-xl);
    }

    .section-tag {
        font-size: 0.65rem;
        letter-spacing: 2px;
        padding: 4px 12px;
    }

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

    .section-desc {
        font-size: 0.9rem;
    }

    /* ---- Mobile Advantages ---- */
    .advantages-grid {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: var(--space-md);
        padding-bottom: var(--space-md);
        margin: 0 -16px;
        padding-left: 16px;
        padding-right: 16px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        max-width: none;
    }

    .advantages-grid::-webkit-scrollbar {
        display: none;
    }

    .advantage-card {
        min-width: 280px;
        max-width: 300px;
        flex-shrink: 0;
        scroll-snap-align: center;
        padding: var(--space-lg);
    }

    .advantage-card:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }

    .advantage-icon {
        width: 52px;
        height: 52px;
    }

    .advantage-icon i {
        font-size: 1.2rem;
    }

    .advantage-card h3 {
        font-size: 1.05rem;
    }

    .advantage-card p {
        font-size: 0.85rem;
    }

    /* ---- Mobile About ---- */
    .about-content-full {
        max-width: 100%;
    }

    .about-content-full .section-title {
        font-size: 1.4rem;
    }

    .story-block {
        padding-left: var(--space-md);
        margin-bottom: var(--space-lg);
    }

    .story-block h3 {
        font-size: 0.95rem;
    }

    .story-block p {
        font-size: 0.88rem;
        line-height: 1.75;
    }

    .about-credentials {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .credential {
        font-size: 0.82rem;
        padding: var(--space-xs) 0;
    }

    /* ---- Mobile Philosophy ---- */
    .philosophy-content {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        max-width: 100%;
    }

    .philosophy-card {
        padding: var(--space-lg);
    }

    .philosophy-card:hover {
        transform: none;
    }

    .philosophy-card h3 {
        font-size: 1rem;
    }

    .philosophy-card p {
        font-size: 0.85rem;
    }

    /* ---- Mobile Curriculum ---- */
    .courses-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        max-width: 100%;
    }

    .course-card:hover {
        transform: none;
    }

    .course-cover {
        height: 160px;
    }

    .course-info {
        padding: var(--space-md);
    }

    .course-info h4 {
        font-size: 0.95rem;
    }

    .course-info p {
        font-size: 0.82rem;
    }

    /* ---- Mobile Contact Form ---- */
    .contact-layout {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .contact-info .section-title {
        text-align: left;
        font-size: 1.4rem;
    }

    .contact-info .section-tag {
        display: inline-block;
    }

    .contact-desc {
        text-align: left;
        font-size: 0.88rem;
    }

    .contact-highlights {
        display: none;
    }

    .consultation-form {
        padding: var(--space-lg);
        border-radius: var(--radius-lg);
    }

    .form-header h3 {
        font-size: 1.05rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* iOS zoom prevention: inputs must be 16px */
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px;
        padding: 14px 16px;
        min-height: 48px;
        border-radius: var(--radius-md);
    }

    .form-group label {
        font-size: 0.85rem;
    }

    .form-group textarea {
        min-height: 100px;
    }

    .btn-full {
        min-height: 52px;
        font-size: 1rem;
    }

    .form-note {
        font-size: 0.72rem;
    }

    /* ---- Mobile Footer ---- */
    .footer {
        padding-bottom: calc(var(--space-xl) + 80px);
    }

    .footer-main {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .footer-links {
        flex-direction: row;
        gap: var(--space-xl);
    }

    .footer-col h4 {
        font-size: 0.75rem;
        margin-bottom: var(--space-md);
    }

    .footer-col a {
        font-size: 0.82rem;
        min-height: 44px;
        display: flex;
        align-items: center;
        margin-bottom: 0;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }

    /* ---- Mobile Back to Top ---- */
    .back-to-top {
        bottom: 80px;
        right: 16px;
        width: 40px;
        height: 40px;
    }

    /* ---- Mobile Sticky CTA ---- */
    .mobile-sticky-cta {
        display: block;
    }
}

/* --- SMALL MOBILE (max-width: 380px) --- */
@media (max-width: 380px) {
    .section-container {
        padding: 0 12px;
    }

    .banner-container {
        padding: 0 12px;
    }

    .banner-title {
        font-size: 1.3rem;
    }

    .banner-subtitle {
        font-size: 0.8rem;
    }

    .stat-number {
        font-size: 1.35rem;
    }

    .stat-suffix {
        font-size: 0.85rem;
    }

    .advantage-card {
        min-width: 250px;
    }

    .consultation-form {
        padding: var(--space-md);
    }

    .footer-links {
        flex-direction: column;
        gap: var(--space-lg);
    }
}

/* ============================================
   SMOOTH SCROLLBAR & SELECTION
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-pearl);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-lighter);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-light);
}

/* Print-friendly */
@media print {
    .navbar, .back-to-top, .mobile-sticky-cta {
        display: none !important;
    }
    
    .top-banner {
        padding-top: var(--space-xl);
    }
    
    body {
        color: #000;
    }
}