:root {
  --ink: #1A1D23;
  --ink-light: #2D3436;
  --accent: #6C5CE7;
  --accent-light: #A29BFE;
  --accent-50: #F0EEFF;
  --green: #00B894;
  --green-light: #E6F9F4;
  --warm: #FFEAA7;
  --warm-light: #FFF9E6;
  --white: #FFFFFF;
  --gray-500: #636E72;
  --gray-300: #B2BEC3;
  --gray-100: #F5F6FA;
  --shadow: 0 2px 16px rgba(108, 92, 231, 0.08);
  --shadow-hover: 0 8px 30px rgba(108, 92, 231, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font: 17px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  color: var(--ink);
  background: var(--white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER ===== */
header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-100);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1140px;
  margin: 0 auto;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: var(--white);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
}

.logo span {
  color: var(--accent);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2px;
}

.nav-list a {
  text-decoration: none;
  color: var(--gray-500);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.2s;
}

.nav-list a:hover {
  color: var(--accent);
  background: var(--accent-50);
}

.nav-list a.active {
  color: var(--white);
  background: var(--accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--ink);
  padding: 4px;
}

/* ===== FOOTER ===== */
footer {
  background: var(--ink);
  color: var(--gray-300);
  text-align: center;
  padding: 36px 24px;
  margin-top: auto;
  font-size: 14px;
}

footer a {
  color: var(--accent-light);
  text-decoration: none;
  font-weight: 600;
}

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

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--accent-50) 0%, var(--warm-light) 50%, var(--green-light) 100%);
  color: var(--ink);
  padding: 100px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(108,92,231,0.05) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(0,184,148,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero .container {
  position: relative;
}

.hero-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -1.5px;
}

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

.hero .highlight {
  background: linear-gradient(135deg, var(--accent), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 20px;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--white);
  padding: 14px 30px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 16px;
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.25);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(108, 92, 231, 0.35);
}

.btn:active {
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 8px 25px rgba(108, 92, 231, 0.3);
}

.btn-green {
  background: var(--green);
  box-shadow: 0 4px 14px rgba(0, 184, 148, 0.25);
}

.btn-green:hover {
  box-shadow: 0 8px 25px rgba(0, 184, 148, 0.35);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ===== SECTIONS ===== */
.section {
  padding: 80px 24px;
}

.section-alt {
  background: var(--gray-100);
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

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

.section-subtitle {
  font-size: 18px;
  color: var(--gray-500);
  text-align: center;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== CARDS ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 36px 32px;
  transition: all 0.3s;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--green));
  opacity: 0;
  transition: opacity 0.3s;
}

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

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.card-icon {
  width: 56px;
  height: 56px;
  background: var(--accent-50);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
  transition: transform 0.3s;
}

.card:hover .card-icon {
  transform: scale(1.1);
}

.card:nth-child(2) .card-icon { background: var(--green-light); }
.card:nth-child(3) .card-icon { background: var(--warm-light); }
.card:nth-child(4) .card-icon { background: var(--accent-50); }
.card:nth-child(5) .card-icon { background: var(--green-light); }

.card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.card p {
  color: var(--gray-500);
  margin-bottom: 20px;
  line-height: 1.6;
}

.card .btn {
  font-size: 14px;
  padding: 10px 22px;
}

/* ===== HOW IT WORKS ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
  text-align: center;
}

.step {
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  background: var(--accent);
  color: var(--white);
  font-size: 22px;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.3);
}

.step h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step p {
  color: var(--gray-500);
  font-size: 15px;
  line-height: 1.6;
}

/* ===== PAGE HEADER ===== */
.page-header {
  background: linear-gradient(135deg, var(--accent-50) 0%, var(--warm-light) 100%);
  color: var(--ink);
  padding: 64px 24px;
  text-align: center;
  position: relative;
}

.page-header h1 {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.page-header p {
  font-size: 18px;
  color: var(--gray-500);
  max-width: 500px;
  margin: 0 auto;
}

/* ===== VOCABULARY ===== */
.vocab-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.vocab-table th {
  background: var(--accent);
  color: var(--white);
  padding: 16px 20px;
  text-align: left;
  font-weight: 700;
  font-size: 15px;
}

.vocab-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--gray-100);
}

.vocab-table tr:last-child td {
  border-bottom: none;
}

.vocab-table tr:hover td {
  background: var(--accent-50);
}

.vocab-table td:first-child {
  font-weight: 600;
}

.vocab-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}

.category-btn {
  padding: 8px 20px;
  border-radius: 20px;
  border: 2px solid var(--gray-100);
  background: var(--white);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}

.category-btn:hover {
  border-color: var(--accent-light);
  color: var(--accent);
}

.category-btn.active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

/* ===== GRAMMAR ===== */
.grammar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.grammar-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.grammar-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}

.grammar-card .formula {
  background: var(--accent-50);
  padding: 14px 18px;
  border-radius: 10px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 16px;
  margin: 16px 0;
  border-left: 4px solid var(--accent);
  line-height: 1.5;
}

.grammar-card .examples {
  margin-top: 12px;
}

.grammar-card .examples li {
  list-style: none;
  padding: 8px 0;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-100);
}

.grammar-card .examples li:last-child {
  border-bottom: none;
}

.grammar-card .examples li::before {
  content: "→ ";
  color: var(--green);
  font-weight: 700;
}

/* ===== EXERCISES ===== */
.exercise {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.exercise:hover {
  box-shadow: var(--shadow-hover);
}

.exercise h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--accent);
}

.exercise .question {
  font-size: 17px;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--gray-100);
  border-radius: 10px;
  font-weight: 500;
}

.exercise .options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exercise .option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border: 2px solid var(--gray-100);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.exercise .option:hover {
  border-color: var(--accent-light);
  background: var(--accent-50);
}

.exercise .option input[type="radio"] {
  accent-color: var(--accent);
  width: 20px;
  height: 20px;
}

.exercise .option.correct {
  border-color: var(--green);
  background: var(--green-light);
}

.exercise .option.wrong {
  border-color: #E17055;
  background: #FDF0ED;
}

.exercise .feedback {
  margin-top: 14px;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  display: none;
  font-size: 15px;
}

.exercise .feedback.correct {
  display: block;
  background: var(--green-light);
  color: var(--green);
  border: 2px solid var(--green);
}

.exercise .feedback.wrong {
  display: block;
  background: #FDF0ED;
  color: #E17055;
  border: 2px solid #E17055;
}

.fill-input {
  padding: 10px 16px;
  border: 2px solid var(--gray-100);
  border-radius: 10px;
  font-size: 16px;
  width: 220px;
  transition: border-color 0.2s;
  font-family: inherit;
}

.fill-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-50);
}

.fill-input.correct {
  border-color: var(--green);
  background: var(--green-light);
}

.fill-input.wrong {
  border-color: #E17055;
  background: #FDF0ED;
}

/* ===== TESTS ===== */
.test-question {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.test-question h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.test-question h4 .q-number {
  display: inline-flex;
  width: 28px;
  height: 28px;
  background: var(--accent-50);
  color: var(--accent);
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
}

.test-question .options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.test-question .option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 2px solid var(--gray-100);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
}

.test-question .option:hover {
  border-color: var(--accent-light);
  background: var(--accent-50);
}

.test-question .option input[type="radio"] {
  accent-color: var(--accent);
  width: 18px;
  height: 18px;
}

.result-box {
  text-align: center;
  padding: 40px;
  background: linear-gradient(135deg, var(--accent-50), var(--green-light));
  border-radius: 20px;
  margin-top: 32px;
  display: none;
}

.result-box.show {
  display: block;
}

.result-box .score {
  font-size: 56px;
  font-weight: 800;
  color: var(--accent);
}

.result-box p {
  font-size: 18px;
  color: var(--gray-500);
  margin-top: 8px;
}

/* ===== READING ===== */
.reading-text {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.reading-text:hover {
  box-shadow: var(--shadow-hover);
}

.reading-text h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--accent);
}

.reading-text .text-content {
  line-height: 1.9;
  margin-bottom: 24px;
  font-size: 16px;
}

.reading-text .text-content p {
  margin-bottom: 12px;
}

.reading-text .questions {
  background: var(--gray-100);
  padding: 20px 24px;
  border-radius: 12px;
}

.reading-text .questions h4 {
  font-weight: 700;
  margin-bottom: 12px;
  font-size: 16px;
  color: var(--accent);
}

.reading-text .questions ol {
  margin-left: 20px;
}

.reading-text .questions li {
  margin-bottom: 8px;
  color: var(--gray-500);
}

/* ===== CONTACT ===== */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 44px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--ink);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--gray-100);
  border-radius: 12px;
  font-size: 16px;
  font-family: inherit;
  transition: all 0.2s;
  color: var(--ink);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-50);
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
}

.contact-form .btn {
  width: 100%;
  justify-content: center;
}

.form-message {
  text-align: center;
  padding: 24px;
  background: var(--green-light);
  color: var(--green);
  border: 2px solid var(--green);
  border-radius: 14px;
  margin-top: 20px;
  font-weight: 700;
  display: none;
  font-size: 16px;
}

.form-message.show {
  display: block;
}

/* ===== MOTIVATION BANNER ===== */
.motivation-banner {
  background: linear-gradient(135deg, var(--accent) 0%, var(--green) 100%);
  color: var(--white);
  padding: 40px 24px;
  text-align: center;
  border-radius: 20px;
  margin-bottom: 32px;
}

.motivation-banner h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
}

.motivation-banner p {
  font-size: 16px;
  opacity: 0.9;
}

/* ===== DAILY REMINDER TOAST ===== */
.daily-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  max-width: 380px;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 8px 40px rgba(108, 92, 231, 0.2);
  z-index: 200;
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.4s ease;
}

.daily-toast.show {
  transform: translateY(0);
  opacity: 1;
}

.daily-toast .toast-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.daily-toast .toast-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}

.daily-toast .toast-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--gray-300);
  padding: 4px;
  line-height: 1;
}

.daily-toast .toast-close:hover {
  color: var(--ink);
}

.daily-toast p {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 16px;
  line-height: 1.5;
}

.daily-toast .toast-actions {
  display: flex;
  gap: 10px;
}

.daily-toast .toast-actions .btn {
  font-size: 13px;
  padding: 10px 18px;
}

.daily-toast .streak {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 700;
  color: #e17055;
  margin-bottom: 12px;
}

@media (max-width: 480px) {
  .daily-toast {
    left: 12px;
    right: 12px;
    bottom: 12px;
    max-width: none;
  }
}

/* ===== PROGRESS PAGE ===== */
.level-hero {
  text-align: center;
  padding: 48px 32px;
  background: linear-gradient(135deg, var(--accent-50), var(--green-light));
  border-radius: 24px;
  margin-bottom: 32px;
}

.level-hero .level-icon {
  font-size: 56px;
  margin-bottom: 12px;
}

.level-hero .level-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}

.level-hero .level-desc {
  font-size: 16px;
  color: var(--gray-500);
  margin-bottom: 20px;
}

.level-hero .level-xp-total {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.level-bar {
  height: 12px;
  background: var(--gray-100);
  border-radius: 6px;
  overflow: hidden;
  max-width: 400px;
  margin: 12px auto 0;
}

.level-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: 6px;
  transition: width 0.6s ease;
  width: 0%;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.stat-card .stat-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--gray-500);
  margin-top: 4px;
}

.activity-list {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.activity-list h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 15px;
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-item .act-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-50);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.activity-item .act-text {
  flex: 1;
  color: var(--gray-500);
}

.activity-item .act-xp {
  font-weight: 700;
  color: var(--green);
  font-size: 14px;
}

.level-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-50);
  padding: 6px 16px 6px 12px;
  border-radius: 20px;
  font-size: 13px;
}

.level-badge .level-label {
  font-weight: 700;
  color: var(--accent);
}

.level-badge .level-xp {
  color: var(--gray-500);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.card, .step, .grammar-card, .exercise, .reading-text, .test-question {
  animation: fadeInUp 0.5s ease both;
}

.card:nth-child(1) { animation-delay: 0.05s; }
.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.15s; }
.card:nth-child(4) { animation-delay: 0.2s; }
.card:nth-child(5) { animation-delay: 0.25s; }

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
    padding: 8px;
    gap: 2px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  }

  .nav-list.open {
    display: flex;
  }

  .nav-list a {
    padding: 12px 16px;
    border-radius: 10px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    font-size: 18px;
  }

  .hero {
    padding: 60px 20px;
  }

  .section {
    padding: 48px 20px;
  }

  .section-title {
    font-size: 28px;
  }

  .page-header h1 {
    font-size: 32px;
  }

  .page-header {
    padding: 44px 20px;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .grammar-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .vocab-table {
    font-size: 14px;
  }

  .vocab-table th,
  .vocab-table td {
    padding: 10px 12px;
  }

  .contact-form {
    padding: 24px;
  }

  .fill-input {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 10px 16px;
  }

  .logo {
    font-size: 20px;
  }

  .hero {
    padding: 48px 16px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .card {
    padding: 24px;
  }
}