/* ============================================================
   VARIABLES
   ============================================================ */
:root {
  /* Colors */
  --color-bg:            #080a10;
  --color-bg-2:          #0c0e18;
  --color-bg-card:       rgba(255, 255, 255, 0.04);
  --color-bg-card-hover: rgba(255, 255, 255, 0.07);
  --color-border:        rgba(255, 255, 255, 0.08);
  --color-border-hover:  rgba(255, 255, 255, 0.16);

  --color-primary:       #7060ff;
  --color-primary-dark:  #5a4de0;
  --color-primary-glow:  rgba(112, 96, 255, 0.3);
  --color-accent:        #a78bfa;
  --color-accent-2:      #38bdf8;

  --color-text:          #eef0f8;
  --color-text-muted:    #8890b0;
  --color-text-subtle:   #4a5270;

  --color-success:       #34d399;
  --color-star:          #fbbf24;
  --color-badge:         rgba(112, 96, 255, 0.16);
  --color-badge-urgent:  rgba(251, 113, 133, 0.16);
  --color-badge-urgent-text: #fb7185;

  /* Gradients */
  --gradient-primary:    linear-gradient(135deg, #7060ff 0%, #a78bfa 100%);
  --gradient-card:       linear-gradient(145deg, rgba(255,255,255,0.055) 0%, rgba(255,255,255,0.01) 100%);
  --gradient-section-alt:linear-gradient(180deg, transparent 0%, rgba(112,96,255,0.035) 50%, transparent 100%);

  /* Typography */
  --font-sans:    'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl:1.5rem;
  --font-size-3xl:2rem;
  --font-size-4xl:2.75rem;
  --font-size-5xl:3.75rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm:   0.5rem;
  --radius-md:   0.875rem;
  --radius-lg:   1.25rem;
  --radius-xl:   1.75rem;
  --radius-2xl:  2.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.5);
  --shadow-md:   0 4px 20px rgba(0,0,0,0.5), 0 1px 4px rgba(0,0,0,0.3);
  --shadow-lg:   0 16px 48px rgba(0,0,0,0.6), 0 4px 12px rgba(0,0,0,0.3);
  --shadow-xl:   0 32px 80px rgba(0,0,0,0.7);
  --shadow-glow: 0 0 40px rgba(112, 96, 255, 0.28);
  --shadow-btn:  0 4px 24px rgba(112, 96, 255, 0.45);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
  --transition-bounce: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  width: 100%;
  max-width: 1160px;
  margin-inline: auto;
  padding-inline: var(--space-8);
}

/* ============================================================
   SECTIONS
   ============================================================ */
section {
  padding-block: var(--space-24);
  position: relative;
}

section:nth-of-type(even) {
  background: var(--gradient-section-alt);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background: var(--color-badge);
  border-radius: var(--radius-full);
  border: 1px solid rgba(112, 96, 255, 0.2);
}

.section-sub {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin-top: var(--space-4);
  margin-bottom: var(--space-12);
  max-width: 540px;
  line-height: 1.7;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4 {
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.25rem, 5.5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: var(--font-size-xl); font-weight: 700; }
h4 { font-size: var(--font-size-lg); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: calc(var(--space-4) + 1px) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--font-size-md);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: -0.01em;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(112, 96, 255, 0.6);
  color: #fff;
}

.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-btn); }

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  color: var(--color-text);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  color: var(--color-text);
  border-color: var(--color-border-hover);
  background: var(--color-bg-card);
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: var(--color-badge);
  color: var(--color-accent);
  border: 1px solid rgba(112, 96, 255, 0.25);
}

.badge-urgent {
  background: var(--color-badge-urgent);
  color: var(--color-badge-urgent-text);
  border-color: rgba(251, 113, 133, 0.25);
  animation: pulse-badge 3s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.75; }
}

.badge-top {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  background: var(--gradient-primary);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-5);
  border-radius: var(--radius-full);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow: var(--shadow-btn);
}

/* ============================================================
   CARDS
   ============================================================ */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: var(--space-5);
}

.card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  pointer-events: none;
}

.card:hover {
  background: rgba(255,255,255,0.065);
  border-color: rgba(255,255,255,0.14);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.card p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.75;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-badge);
  border: 1px solid rgba(112, 96, 255, 0.22);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

.card-icon svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: var(--space-32) var(--space-24);
  background:
    radial-gradient(ellipse 90% 70% at 50% -5%, rgba(112,96,255,0.22) 0%, transparent 65%),
    radial-gradient(ellipse 50% 50% at 85% 85%, rgba(56,189,248,0.06) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 10% 70%, rgba(167,139,250,0.06) 0%, transparent 50%),
    var(--color-bg);
  background-attachment: fixed;
  overflow: hidden;
  position: relative;
}

/* Subtle dot grid */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

/* Decorative orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  pointer-events: none;
  will-change: transform;
}

.hero-orb--1 {
  width: 560px;
  height: 560px;
  background: rgba(112, 96, 255, 0.14);
  top: -180px;
  left: -140px;
  animation: orb-float 12s ease-in-out infinite;
}

.hero-orb--2 {
  width: 400px;
  height: 400px;
  background: rgba(167, 139, 250, 0.1);
  bottom: -100px;
  right: -80px;
  animation: orb-float 16s ease-in-out infinite reverse;
}

.hero-orb--3 {
  width: 280px;
  height: 280px;
  background: rgba(56, 189, 248, 0.07);
  top: 40%;
  right: 15%;
  animation: orb-float 10s ease-in-out infinite 2s;
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -30px) scale(1.04); }
  66%       { transform: translate(-15px, 20px) scale(0.97); }
}

#hero .container {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge { margin-bottom: var(--space-6); }

#hero h1 {
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, #ffffff 25%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.12;
}

.hero-sub {
  font-size: clamp(var(--font-size-md), 2vw, var(--font-size-xl));
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
  max-width: 560px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.hero-actions .btn-primary {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-lg);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-8);
}

.hero-proof li {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  position: relative;
  padding-left: var(--space-5);
}

.hero-proof li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-success);
  box-shadow: 0 0 6px rgba(52, 211, 153, 0.6);
}

/* Scroll cue */
.hero-scroll-cue {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero-scroll-cue span {
  display: block;
  width: 22px;
  height: 36px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  position: relative;
}

.hero-scroll-cue span::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  background: rgba(255,255,255,0.5);
  border-radius: var(--radius-full);
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-cue 2s ease-in-out infinite;
}

@keyframes scroll-cue {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(14px); }
}

/* ============================================================
   SUBJECTS
   ============================================================ */
#subjects { text-align: center; }
#subjects .section-sub { margin-inline: auto; }

.subjects-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-10);
}

.subjects-list li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-base);
  cursor: default;
}

.subjects-list li:hover {
  background: var(--color-badge);
  border-color: rgba(112,96,255,0.35);
  color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(112,96,255,0.15);
}

.subject-icon {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  flex-shrink: 0;
}

/* ============================================================
   WHY US
   ============================================================ */
#why-us .cards {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

/* ============================================================
   PROCESS
   ============================================================ */
#process { text-align: center; }
#process .section-sub { margin-inline: auto; }

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-12);
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 52px;
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(112,96,255,0.5), rgba(112,96,255,0.5), transparent);
  pointer-events: none;
  z-index: 0;
}

.steps li {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: all var(--transition-base);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.steps li::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.steps li:hover {
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.steps li:hover::after { transform: scaleX(1); }

.steps li div h3 { font-size: var(--font-size-md); margin-bottom: var(--space-2); }
.steps li div p  { color: var(--color-text-muted); font-size: var(--font-size-sm); }

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(112, 96, 255, 0.5);
}

/* ============================================================
   TEACHERS
   ============================================================ */
.teachers-list {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.teacher-card {
  text-align: center;
  padding: var(--space-10) var(--space-8);
}

.teacher-photo {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(112,96,255,0.25) 0%, rgba(56,189,248,0.15) 100%);
  border: 2px solid rgba(255,255,255,0.1);
  margin-inline: auto;
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.teacher-photo svg {
  width: 80px;
  height: 80px;
}

.teacher-card:hover .teacher-photo {
  border-color: rgba(112,96,255,0.5);
  box-shadow: 0 0 24px rgba(112,96,255,0.25);
}

.teacher-card h3  { font-size: var(--font-size-lg); margin-bottom: var(--space-2); }
.teacher-subject  { color: var(--color-accent); font-size: var(--font-size-sm); font-weight: 600; margin-bottom: var(--space-1); }
.teacher-exp      { color: var(--color-text-muted); font-size: var(--font-size-xs); }

/* ============================================================
   RESULTS
   ============================================================ */
.review-card { padding: var(--space-8); }

.review-stars {
  font-size: var(--font-size-md);
  color: var(--color-star);
  margin-bottom: var(--space-4);
  letter-spacing: 2px;
}

.review-card p {
  font-size: var(--font-size-md);
  color: var(--color-text);
  font-style: italic;
  line-height: 1.8;
  margin-bottom: var(--space-5);
  position: relative;
}

.review-card p::before {
  content: '\201C';
  position: absolute;
  top: -0.35em;
  left: -0.1em;
  font-size: 3.5rem;
  line-height: 1;
  color: rgba(112, 96, 255, 0.2);
  font-style: normal;
  font-weight: 800;
  pointer-events: none;
}

.review-card span {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 600;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-12);
}

.stat {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: all var(--transition-base);
}

.stat:hover {
  border-color: rgba(112,96,255,0.3);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.stat strong {
  display: block;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat span {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ============================================================
   PRICING
   ============================================================ */
#pricing { text-align: center; }
#pricing .section-sub { margin-inline: auto; }

.pricing-cards {
  grid-template-columns: repeat(3, 1fr);
  align-items: start;
  gap: var(--space-5);
  padding-top: 1.5rem;
}

.pricing-card {
  text-align: left;
  padding: var(--space-10) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.pricing-card.featured {
  border-color: rgba(112, 96, 255, 0.45);
  background: linear-gradient(145deg, rgba(112,96,255,0.13) 0%, rgba(167,139,250,0.04) 100%);
  box-shadow: var(--shadow-glow), 0 0 0 1px rgba(112,96,255,0.2);
  padding-top: calc(var(--space-10) + var(--space-5));
  position: relative;
  overflow: visible;
}

.pricing-card h3 { font-size: var(--font-size-xl); }

.price {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.price-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
  margin-top: calc(-1 * var(--space-3));
}

.pricing-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.pricing-card ul li {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-6);
  position: relative;
}

.pricing-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-success);
  box-shadow: 0 0 6px rgba(52,211,153,0.5);
}

.promo-note {
  margin-top: var(--space-10);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-6);
  background: var(--color-badge);
  border: 1px solid rgba(112,96,255,0.2);
  border-radius: var(--radius-lg);
  display: inline-block;
}

/* ============================================================
   FAQ
   ============================================================ */
#faq { text-align: center; }

.faq-list {
  max-width: 720px;
  margin-inline: auto;
  margin-top: var(--space-10);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.faq-item:has(.faq-question[aria-expanded="true"]) {
  border-color: rgba(112,96,255,0.35);
  box-shadow: 0 0 0 1px rgba(112,96,255,0.1);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  font-weight: 600;
  padding: var(--space-6) var(--space-8);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  transition: color var(--transition-fast);
  letter-spacing: -0.01em;
}

.faq-question:hover { color: var(--color-accent); }

.faq-question::after {
  content: '';
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238890b0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='12' y1='5' x2='12' y2='19'/%3E%3Cline x1='5' y1='12' x2='19' y2='12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: contain;
  transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"]::after {
  transform: rotate(45deg);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a78bfa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='12' y1='5' x2='12' y2='19'/%3E%3Cline x1='5' y1='12' x2='19' y2='12'/%3E%3C/svg%3E");
}

.faq-answer {
  display: none;
  padding: 0 var(--space-8) var(--space-6);
}

.faq-answer.is-open {
  display: block;
  animation: fade-down 0.22s ease;
}

.faq-answer p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.8;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
}

@keyframes fade-down {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   CTA
   ============================================================ */
#cta {
  background:
    radial-gradient(ellipse 80% 70% at 50% 0%, rgba(112,96,255,0.18) 0%, transparent 60%),
    var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.cta-sub {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin-top: var(--space-4);
  margin-bottom: var(--space-10);
}

.cta-sub strong { color: var(--color-accent); }

.cta-card {
  max-width: 640px;
  margin-inline: auto;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-12);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: left;
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: -0.01em;
}

.form-group input,
.form-group select {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  padding: var(--space-4) var(--space-5);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238890b0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-color: rgba(255,255,255,0.05);
  padding-right: var(--space-10);
}

.form-group select option {
  background: #1a1d2e;
  color: var(--color-text);
}

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

.form-group input:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  background: rgba(112, 96, 255, 0.05);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.cta-form .btn-primary {
  padding-block: var(--space-5);
  font-size: var(--font-size-lg);
  margin-top: var(--space-2);
  width: 100%;
}

.form-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  text-align: center;
}

.form-note a { color: var(--color-text-muted); }
.form-note a:hover { color: var(--color-text); }

/* ============================================================
   SITE HEADER — logo image
   ============================================================ */
a.site-header__logo {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: unset;
  background-clip: unset;
}

.site-header__logo-img {
  display: block;
  height: 52px;
  width: auto;
  object-fit: contain;
}

@media (max-width: 700px) {
  .site-header__logo-img { height: 42px; }
}

/* ============================================================
   MODAL
   ============================================================ */
body.modal-open { overflow: hidden; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 8000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.modal__box {
  position: relative;
  z-index: 1;
  background: #0f111c;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  max-width: 640px;
  width: 100%;
  max-height: 82vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(112, 96, 255, 0.15);
  scrollbar-width: thin;
  scrollbar-color: rgba(112, 96, 255, 0.35) transparent;
}

.modal__box::-webkit-scrollbar         { width: 4px; }
.modal__box::-webkit-scrollbar-thumb   { background: rgba(112,96,255,0.35); border-radius: 4px; }

.modal__box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(112,96,255,0.45), rgba(167,139,250,0.3), transparent);
  pointer-events: none;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal.is-open .modal__box {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: 1.125rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base), color var(--transition-fast);
  line-height: 1;
  padding: 0;
  font-family: var(--font-sans);
}

.modal__close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-text);
}

.modal__box h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  padding-right: 2.5rem;
  line-height: 1.2;
}

.modal__body p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.85;
  margin-bottom: var(--space-4);
}

.modal__body strong {
  color: var(--color-text);
  font-weight: 600;
}

.modal__body a {
  color: var(--color-accent);
  text-decoration: none;
}

.modal__body a:hover { color: var(--color-text); }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-16) var(--space-10);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr;
  gap: var(--space-12);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-8);
}

.footer-brand .logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
  display: block;
}

.footer-brand p:not(.logo) {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.75;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast), padding-left var(--transition-base);
  display: inline-block;
}

.footer-nav a:hover {
  color: var(--color-text);
  padding-left: var(--space-2);
}

.footer-contacts {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-contacts p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  line-height: 1.65;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-contacts a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-contacts a:hover { color: var(--color-text); }

.footer-social {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-social:hover { color: var(--color-text); }

.footer-promo {
  display: inline-block;
  margin-top: var(--space-2);
  color: var(--color-accent) !important;
  font-weight: 600 !important;
  font-size: var(--font-size-sm) !important;
}

.footer-copy {
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  text-align: center;
  letter-spacing: 0.01em;
}

/* ============================================================
   RESPONSIVE — TABLET (960px)
   ============================================================ */
@media (max-width: 960px) {
  :root {
    --space-24: 4.5rem;
    --space-32: 6rem;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps::before { display: none; }

  .pricing-cards {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

  .pricing-card.featured {
    margin-top: 0;
  }

  .stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer-brand { grid-column: 1 / -1; }

  .cta-card {
    padding: var(--space-8);
  }
}

/* ============================================================
   RESPONSIVE — SMALL TABLET (768px)
   ============================================================ */
@media (max-width: 768px) {
  h2 { font-size: clamp(1.5rem, 5vw, 2rem); }

  .section-sub {
    font-size: var(--font-size-md);
    margin-bottom: var(--space-10);
  }

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

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

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

  .stats {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }

  .stat {
    padding: var(--space-6) var(--space-4);
  }

  .stat strong {
    font-size: clamp(1.5rem, 4vw, 2rem);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-brand { grid-column: auto; }
}

/* ============================================================
   RESPONSIVE — MOBILE (640px)
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --space-24: 3.5rem;
    --space-20: 3rem;
    --space-16: 2.5rem;
    --space-12: 2rem;
  }

  .container { padding-inline: var(--space-5); }

  #hero {
    padding-top: calc(68px + var(--space-8));
    padding-bottom: var(--space-16);
    text-align: center;
    background-attachment: scroll;
  }

  #hero .container { max-width: 100%; }

  .hero-badge { margin-bottom: var(--space-5); }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .hero-actions .btn {
    text-align: center;
    width: 100%;
    justify-content: center;
  }

  .hero-actions .btn-primary {
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-sm);
    white-space: normal;
    line-height: 1.4;
  }

  .hero-proof {
    justify-content: center;
    gap: var(--space-2) var(--space-5);
  }

  .hero-scroll-cue { display: none; }

  .section-label { font-size: 0.65rem; }

  .section-sub {
    max-width: 100%;
    font-size: var(--font-size-md);
    margin-bottom: var(--space-8);
  }

  .cards {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .card {
    padding: var(--space-6);
  }

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

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-10);
  }

  .steps li {
    padding: var(--space-6);
  }

  .stats {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin-top: var(--space-8);
  }

  .stat {
    padding: var(--space-5) var(--space-3);
  }

  .stat strong {
    font-size: clamp(1.25rem, 5vw, 1.75rem);
  }

  .stat span {
    font-size: var(--font-size-xs);
  }

  .pricing-cards {
    grid-template-columns: 1fr;
    max-width: 100%;
    padding-top: 1.5rem;
  }

  .pricing-card {
    padding: var(--space-6) var(--space-6);
  }

  .pricing-card.featured {
    padding-top: calc(var(--space-8) + var(--space-5));
  }

  .subjects-list {
    gap: var(--space-2);
    margin-bottom: var(--space-8);
  }

  .subjects-list li {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-xs);
  }

  #faq { padding-top: 5rem !important; }

  .faq-list { margin-top: var(--space-6); }

  .faq-question {
    padding: var(--space-5);
    font-size: var(--font-size-sm);
    gap: var(--space-4);
  }

  .faq-answer {
    padding: 0 var(--space-5) var(--space-5);
  }

  .modal { padding: var(--space-4); }

  .modal__box {
    padding: var(--space-6) var(--space-5);
    max-height: 90vh;
    border-radius: var(--radius-lg);
  }

  .footer-contacts p { gap: var(--space-1); }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-brand { grid-column: auto; }

  .cta-card {
    padding: var(--space-6) var(--space-5);
  }

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

  .promo-note {
    display: block;
    text-align: center;
    margin-top: var(--space-8);
  }

  .hero-orb--1 { width: 280px; height: 280px; }
  .hero-orb--2 { width: 200px; height: 200px; }
  .hero-orb--3 { display: none; }
}

/* ============================================================
   RESPONSIVE — SMALL MOBILE (400px)
   ============================================================ */
@media (max-width: 400px) {
  :root {
    --space-24: 3rem;
  }

  .container { padding-inline: var(--space-4); }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .btn {
    padding-inline: var(--space-6);
    font-size: var(--font-size-sm);
  }

  .stats {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .stat {
    padding: var(--space-5) var(--space-4);
  }

  .cta-card {
    padding: var(--space-5) var(--space-4);
  }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }
}

/* ============================================================
   FOCUS VISIBLE
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar         { width: 5px; }
::-webkit-scrollbar-track   { background: var(--color-bg); }
::-webkit-scrollbar-thumb   { background: var(--color-text-subtle); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* ============================================================
   SELECTION
   ============================================================ */
::selection {
  background: rgba(112, 96, 255, 0.32);
  color: var(--color-text);
}