/* ==========================================================================
   Design System & Theme Variables
   ========================================================================== */
:root {
    --primary-orange: #FF5700;
    --primary-orange-hover: #E04D00;
    --primary-orange-light: rgba(255, 87, 0, 0.08);
    --primary-orange-alpha: rgba(255, 87, 0, 0.15);
    
    --navy-dark: #0B132B;
    --navy-medium: #1C2541;
    --navy-light: #3A506B;
    --navy-glow: rgba(11, 19, 43, 0.05);
    
    --bg-light: #F8F9FA;
    --bg-gray: #F0F2F5;
    --bg-white: #FFFFFF;
    
    --text-dark: #1E293B;
    --text-main: #334155;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    
    --border-color: #E2E8F0;
    --border-hover: #CBD5E1;
    
    --font-main: 'Manrope', sans-serif;
    --font-accent: 'Montserrat', sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 25px rgba(0,0,0,0.05);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.08);
    --shadow-orange: 0 10px 30px rgba(255, 87, 0, 0.25);
    --shadow-inset: inset 0 2px 4px rgba(0,0,0,0.06);
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-light);
}

body {
    font-family: var(--font-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   Typography & Headers
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-accent);
    color: var(--navy-dark);
    font-weight: 800;
    line-height: 1.2;
}

/* ==========================================================================
   Button Components
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    text-align: center;
}

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

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

.btn-orange:active {
    transform: translateY(0);
}

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

.btn-navy:hover {
    background-color: var(--navy-medium);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(11, 19, 43, 0.2);
}

.btn-navy:active {
    transform: translateY(0);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.btn-full {
    width: 100%;
}

.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 30%;
    height: 200%;
    background: rgba(255, 255, 255, 0.25);
    transform: rotate(30deg);
    transition: none;
    opacity: 0;
}

.btn-glow:hover::after {
    left: 130%;
    opacity: 1;
    transition: all 0.8s ease-in-out;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    transition: var(--transition-normal);
}

.header-container {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-orange);
    color: var(--bg-white);
    font-family: var(--font-accent);
    font-size: 1.4rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

.logo-text {
    font-family: var(--font-accent);
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--navy-dark);
}

.logo-text .accent {
    color: var(--primary-orange);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-dark);
    padding: 8px 4px;
    letter-spacing: 0.5px;
}

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

.nav-divider {
    color: var(--text-light);
    font-weight: 300;
    pointer-events: none;
}

.header-cta {
    background-color: var(--primary-orange-light);
    color: var(--primary-orange);
    padding: 10px 20px;
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 87, 0, 0.2);
}

.header-cta:hover {
    background-color: var(--primary-orange);
    color: var(--bg-white);
    border-color: var(--primary-orange);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--navy-dark);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-white);
    z-index: 200;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateY(-100%);
    transition: var(--transition-slow);
}

.mobile-nav-overlay.open {
    transform: translateY(0);
}

.close-menu-btn {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 2rem;
    color: var(--navy-dark);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.mobile-link {
    font-family: var(--font-accent);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--navy-dark);
}

.mobile-link:hover {
    color: var(--primary-orange);
}

.mobile-cta {
    background-color: var(--primary-orange);
    color: var(--bg-white) !important;
    padding: 12px 32px;
    border-radius: var(--radius-md);
    font-size: 1.2rem;
    margin-top: 16px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    padding-top: 140px;
    padding-bottom: 80px;
    background-color: var(--bg-light);
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
}

.hero-content {
    max-width: 580px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
    color: var(--navy-dark);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-visual {
    position: relative;
    height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Room interior representation as mockup bg */
.hero-bg-interior {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    border-radius: var(--radius-xl);
    z-index: 1;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.shelf-decor {
    position: absolute;
    right: 40px;
    top: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    opacity: 0.85;
}

.teapot-svg {
    font-size: 1.5rem;
    color: var(--navy-light);
    transform: rotate(-10deg);
}

.vase-decor {
    width: 12px;
    height: 40px;
    background-color: var(--navy-dark);
    border-radius: 4px;
    position: relative;
}

.vase-decor::before {
    content: '';
    position: absolute;
    bottom: 38px;
    left: -8px;
    width: 28px;
    height: 2px;
    background-color: var(--text-muted);
    transform: rotate(45deg);
}

/* Rounded photo card overlay */
.student-card-wrapper {
    position: relative;
    z-index: 2;
    width: 320px;
    height: 380px;
    transform: rotate(2deg);
    transition: var(--transition-normal);
}

.student-card-wrapper:hover {
    transform: rotate(0) scale(1.03);
}

.student-card {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    border: 6px solid var(--bg-white);
}

.student-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.laptop-brand {
    position: absolute;
    bottom: 30px;
    left: 30px;
    background-color: var(--bg-white);
    color: var(--navy-dark);
    font-family: var(--font-accent);
    font-weight: 800;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    font-size: 1rem;
    letter-spacing: 2px;
}

/* Sparkle accents */
.sparkle-1, .sparkle-2 {
    position: absolute;
    font-size: 1.8rem;
    color: var(--primary-orange);
    animation: sparkle-pulse 3s infinite ease-in-out;
    pointer-events: none;
}

.sparkle-1 {
    bottom: -15px;
    right: -15px;
    animation-delay: 0.5s;
}

.sparkle-2 {
    top: -15px;
    left: -15px;
}

@keyframes sparkle-pulse {
    0%, 100% { transform: scale(0.8); opacity: 0.4; }
    50% { transform: scale(1.2); opacity: 1; }
}

/* ==========================================================================
   Section 2: HSK Levels & Level Test
   ========================================================================== */
.levels-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.levels-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: center;
}

/* Staircase timeline layout */
.levels-staircase {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.stair-step {
    display: flex;
    align-items: center;
    gap: 24px;
    position: relative;
    z-index: 2;
    transition: var(--transition-normal);
}

.stair-step:hover {
    transform: translateX(10px);
}

.cloud-icon-wrapper {
    width: 64px;
    height: 64px;
    background-color: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--navy-dark);
    flex-shrink: 0;
    transition: var(--transition-normal);
}

.stair-step:hover .cloud-icon-wrapper {
    background-color: var(--primary-orange-light);
    border-color: var(--primary-orange);
    color: var(--primary-orange);
    box-shadow: 0 0 15px rgba(255, 87, 0, 0.15);
}

.cloud-svg {
    width: 36px;
    height: 36px;
    transition: transform 5s ease;
}

.stair-step:hover .cloud-svg {
    transform: translateY(-2px);
}

.step-info h3 {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.step-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Step indentation offsets for staircase visualization */
.step-1 { align-self: flex-start; }
.step-2 { align-self: flex-start; margin-left: 80px; }
.step-3 { align-self: flex-start; margin-left: 160px; }
.step-4 { align-self: flex-start; margin-left: 240px; }

/* Connecting line SVGs for staircase */
.stair-connector {
    position: absolute;
    width: 80px;
    height: 80px;
    z-index: 1;
    opacity: 0.4;
    pointer-events: none;
}

.conn-1 {
    top: 55px;
    left: 32px;
}

.conn-2 {
    top: 155px;
    left: 112px;
}

.conn-3 {
    top: 255px;
    left: 192px;
}

/* Test Level Card Box */
.test-card-box {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.test-card-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.1);
}

.test-card-header {
    background-color: var(--primary-orange);
    color: var(--bg-white);
    padding: 24px;
    text-align: center;
}

.test-card-header h2 {
    color: var(--bg-white);
    font-size: 1.6rem;
    font-weight: 800;
}

.test-card-body {
    padding: 40px;
}

.test-meta {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--navy-dark);
}

.meta-item i {
    font-size: 1.25rem;
    color: var(--primary-orange);
    width: 24px;
}

/* ==========================================================================
   Section 3: Teachers & Formats
   ========================================================================== */
.teachers-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.teachers-container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 80px;
    align-items: start;
}

/* Teachers Grid */
.teachers-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.teacher-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.teacher-card.featured {
    border-color: var(--primary-orange);
    box-shadow: 0 10px 30px rgba(255, 87, 0, 0.08);
}

.teacher-avatar-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.teacher-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.flag-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--bg-white);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 1.1rem;
    box-shadow: var(--shadow-sm);
    line-height: 1;
}

.teacher-info h3 {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 6px;
}

.teacher-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Formats Column */
.formats-wrapper {
    position: sticky;
    top: 120px;
}

.formats-title {
    font-size: 2.2rem;
    margin-bottom: 32px;
    letter-spacing: -0.5px;
}

.format-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.format-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.format-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.format-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-orange-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-orange);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.format-info h3 {
    font-size: 1.15rem;
    margin-bottom: 6px;
}

.format-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Section 4: Schedule & Prices
   ========================================================================== */
.schedule-prices-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.schedule-prices-container {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 80px;
    align-items: start;
}

/* Schedule section styling */
.schedule-wrapper {
    position: sticky;
    top: 120px;
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.schedule-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.schedule-item {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.schedule-item:hover {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    border-color: var(--border-hover);
}

.schedule-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 6px;
}

.sched-label {
    color: var(--text-muted);
    font-weight: 500;
}

.sched-val {
    color: var(--navy-dark);
    font-weight: 700;
}

.schedule-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    margin-top: 4px;
}

.status-available {
    color: #2F855A;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #48BB78;
    border-radius: 50%;
    animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(72, 187, 120, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(72, 187, 120, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(72, 187, 120, 0); }
}

/* Pricing Grid */
.price-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 32px;
}

.price-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition-normal);
}

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

.price-card.featured {
    border-color: var(--primary-orange);
    background-color: var(--bg-white);
    box-shadow: 0 15px 35px rgba(255, 87, 0, 0.08);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-orange);
    color: var(--bg-white);
    font-size: 0.75rem;
    font-weight: 800;
    padding: 6px 16px;
    border-radius: 30px;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-orange);
}

.price-card-body {
    padding: 32px;
}

.price-tier {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.price-amount {
    font-size: 2.2rem;
    font-family: var(--font-accent);
    font-weight: 800;
    color: var(--navy-dark);
    margin-bottom: 24px;
}

.price-period {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 400;
}

.price-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.price-features li {
    font-size: 0.9rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 12px;
}

.price-features i {
    color: var(--primary-orange);
    font-size: 1.05rem;
}

.price-card:not(.featured) .price-features i {
    color: var(--navy-light);
}

.select-tariff-btn {
    width: 100%;
}

/* ==========================================================================
   Section 5: Registration Form & Personal Account Mockup
   ========================================================================== */
.register-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.register-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

/* Form block */
.form-wrapper {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.form-title {
    font-size: 1.8rem;
    margin-bottom: 32px;
    line-height: 1.3;
}

.lead-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
    transition: opacity var(--transition-fast);
}

/* Custom Input Styling */
.input-group {
    position: relative;
    width: 100%;
}

.input-group input {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    outline: none;
    font-family: inherit;
    background: transparent;
    color: var(--text-dark);
    transition: var(--transition-fast);
}

.input-group input:focus {
    border-color: var(--primary-orange);
    box-shadow: 0 0 0 4px var(--primary-orange-light);
}

.input-group input::placeholder {
    color: var(--text-light);
}

.error-msg {
    display: block;
    color: #E53E3E;
    font-size: 0.78rem;
    font-weight: 700;
    margin-top: 6px;
    height: 16px;
    transition: var(--transition-fast);
    text-align: left;
    padding-left: 4px;
}

.input-group input.invalid {
    border-color: #E53E3E;
}

/* Success Message Container */
.form-success-message {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 40px 0;
    animation: fade-in-up 0.5s ease forwards;
}

.success-icon {
    font-size: 4.5rem;
    color: #48BB78;
    margin-bottom: 24px;
}

.form-success-message h3 {
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.form-success-message p {
    color: var(--text-muted);
}

@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard browser mockup */
.dashboard-mockup {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 400px;
    transition: var(--transition-normal);
}

.dashboard-mockup:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.12);
}

.browser-header {
    background-color: #E2E8F0;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    position: relative;
}

.browser-buttons {
    display: flex;
    gap: 8px;
}

.dot-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-btn.red { background-color: #FF5F56; }
.dot-btn.yellow { background-color: #FFBD2E; }
.dot-btn.green { background-color: #27C93F; }

.browser-address {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-white);
    padding: 4px 32px;
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border: 1px solid rgba(0,0,0,0.05);
}

.dashboard-body {
    display: flex;
    flex: 1;
    height: calc(100% - 40px);
}

.dash-sidebar {
    width: 72px;
    background-color: var(--bg-light);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
    gap: 32px;
}

.sidebar-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--primary-orange);
}

.sidebar-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.menu-icon {
    font-size: 1.15rem;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition-fast);
}

.menu-icon.active, .menu-icon:hover {
    color: var(--primary-orange);
}

.dash-content {
    flex: 1;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.dash-section-title {
    font-size: 1.15rem;
    font-weight: 800;
}

.dash-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 16px;
    border: 1px solid var(--border-color);
}

.progress-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.card-header-flex {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    font-size: 0.9rem;
}

.progress-percent {
    color: var(--primary-orange);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: #E2E8F0;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--primary-orange);
    border-radius: 10px;
    animation: bar-expand 1.5s ease-out forwards;
}

@keyframes bar-expand {
    from { width: 0%; }
}

.dash-bottom-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.dash-bottom-grid h5 {
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.lesson-alert-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.lesson-tag {
    align-self: flex-start;
    font-size: 0.7rem;
    font-weight: 800;
    background-color: var(--primary-orange-light);
    color: var(--primary-orange);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid rgba(255, 87, 0, 0.15);
}

.lesson-time {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--navy-dark);
}

.access-buttons {
    display: flex;
    gap: 8px;
}

.access-btn {
    flex: 1;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px;
    gap: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.access-btn:hover {
    border-color: var(--primary-orange);
    color: var(--primary-orange);
}

.access-btn i {
    font-size: 1rem;
}

.access-btn span {
    font-size: 0.7rem;
    font-weight: 700;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.main-footer {
    background-color: var(--navy-dark);
    color: var(--bg-white);
    padding: 60px 0;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 1fr;
    gap: 40px;
    align-items: center;
}

.footer-brand .logo-text {
    color: var(--bg-white);
}

.copyright {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary-orange);
}

.footer-contacts {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-light);
    font-weight: 600;
}

.contact-item:hover {
    color: var(--primary-orange);
}

.contact-item i {
    color: var(--primary-orange);
    font-size: 1.1rem;
}

/* ==========================================================================
   Quiz Modal Styling
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(11, 19, 43, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.modal-overlay.open {
    display: flex;
    opacity: 1;
}

.modal-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 580px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.3);
    position: relative;
    overflow: hidden;
    transform: translateY(30px);
    transition: transform var(--transition-normal);
}

.modal-overlay.open .modal-card {
    transform: translateY(0);
}

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
    z-index: 10;
}

.modal-close-btn:hover {
    color: var(--primary-orange);
}

.quiz-container {
    padding: 40px;
}

.quiz-progress-wrapper {
    width: 100%;
    height: 6px;
    background-color: var(--bg-gray);
    border-radius: 10px;
    margin-bottom: 32px;
    overflow: hidden;
}

.quiz-progress-bar {
    height: 100%;
    background-color: var(--primary-orange);
    border-radius: 10px;
    transition: width var(--transition-normal);
}

.quiz-question-container {
    display: flex;
    flex-direction: column;
}

.question-number {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--primary-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.question-title {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.3;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quiz-opt-btn {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-align: left;
    color: var(--text-main);
    transition: var(--transition-fast);
}

.quiz-opt-btn:hover {
    background-color: var(--primary-orange-light);
    border-color: var(--primary-orange);
    color: var(--primary-orange);
}

/* Quiz Results Panel */
.quiz-results {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    animation: fade-in-up 0.5s ease forwards;
}

.result-badge {
    font-size: 3.5rem;
    color: var(--primary-orange);
    margin-bottom: 16px;
}

.quiz-results h3 {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 4px;
}

.result-level {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--navy-dark);
    margin-bottom: 16px;
}

.result-description {
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 32px;
    line-height: 1.6;
}

/* ==========================================================================
   Responsive Adaptations (Media Queries)
   ========================================================================== */

/* Tablet viewports */
@media (max-width: 1024px) {
    .hero-container,
    .levels-container,
    .teachers-container,
    .schedule-prices-container,
    .register-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero-content {
        text-align: center;
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-visual {
        height: 400px;
    }
    
    .levels-staircase {
        align-self: center;
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .step-1, .step-2, .step-3, .step-4 {
        margin-left: 0 !important;
        align-self: stretch;
    }
    
    .stair-connector {
        display: none;
    }
    
    .formats-wrapper, .schedule-wrapper {
        position: static;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }
    
    .footer-links, .footer-contacts {
        align-items: center;
    }
}

/* Mobile viewports */
@media (max-width: 768px) {
    .nav-links, .header-cta {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.2rem;
        letter-spacing: -1px;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .student-card-wrapper {
        width: 280px;
        height: 330px;
    }
    
    .teachers-grid {
        grid-template-columns: 1fr;
    }
    
    .form-wrapper {
        padding: 32px 24px;
    }
    
    .form-title {
        font-size: 1.5rem;
    }
    
    .dash-bottom-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-mockup {
        height: 450px;
    }
}