/* ========================================
   Ascend Landing Page — Styles
   ======================================== */

/* --- CSS Variables --- */
:root {
  --primary: #4A90D9;
  --primary-dark: #357ABD;
  --bg: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --text: #1A1A2E;
  --text-secondary: #6B7280;
  --card-bg: #FFFFFF;
  --border: #E5E7EB;
  --gradient-start: #4A90D9;
  --gradient-end: #7C3AED;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 50px -10px rgba(0, 0, 0, 0.12);
  --transition: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D1117;
    --bg-secondary: #161B22;
    --text: #F0F6FC;
    --text-secondary: #8B949E;
    --card-bg: #1C2128;
    --border: #30363D;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.25), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* --- Container --- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }
}

/* --- Typography Utilities --- */
.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #FFFFFF;
  padding: 14px 28px;
  box-shadow: 0 4px 15px rgba(74, 144, 217, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(74, 144, 217, 0.4);
}

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

.btn-lg {
  padding: 18px 36px;
  font-size: 18px;
  border-radius: 14px;
}

.btn-arrow {
  transition: transform var(--transition);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  .nav {
    background: rgba(13, 17, 23, 0.8);
  }
}

.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow);
}

.nav-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

@media (min-width: 768px) {
  .nav-container {
    padding: 0 40px;
    height: 72px;
  }
}

.nav-logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 4px;
}

.logo-penguin {
  font-size: 24px;
  line-height: 1;
}

.nav-cta {
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #FFFFFF;
  transition: all var(--transition);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 144, 217, 0.35);
}

/* --- Hero --- */
.hero {
  padding-top: 120px;
  padding-bottom: 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero {
    padding-top: 140px;
    padding-bottom: 100px;
  }
}

.hero > .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
  width: 100%;
}

@media (min-width: 1024px) {
  .hero > .container {
    flex-direction: row;
    gap: 64px;
  }
}

.hero-content {
  text-align: center;
  flex: 1;
}

@media (min-width: 1024px) {
  .hero-content {
    text-align: left;
  }
}

.hero-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(74, 144, 217, 0.1);
  padding: 8px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

@media (prefers-color-scheme: dark) {
  .hero-badge {
    background: rgba(74, 144, 217, 0.15);
  }
}

.hero-title {
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 520px;
  margin-bottom: 36px;
}

@media (min-width: 1024px) {
  .hero-subtitle {
    margin-bottom: 40px;
  }
}

@media (max-width: 1023px) {
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

/* Hero Visual */
.hero-visual {
  flex-shrink: 0;
}

.hero-penguin-wrapper {
  position: relative;
  width: 280px;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .hero-penguin-wrapper {
    width: 360px;
    height: 360px;
  }
}

.hero-penguin {
  font-size: 140px;
  line-height: 1;
  position: relative;
  z-index: 2;
  animation: penguinFloat 4s ease-in-out infinite;
}

@media (min-width: 768px) {
  .hero-penguin {
    font-size: 180px;
  }
}

@keyframes penguinFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

.hero-glow {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.2) 0%, rgba(124, 58, 237, 0.1) 50%, transparent 70%);
  filter: blur(30px);
  z-index: 1;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}

.xp-float {
  position: absolute;
  font-size: 14px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 100px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  z-index: 3;
  white-space: nowrap;
  animation: xpFloat 5s ease-in-out infinite;
}

.xp-1 {
  top: 20%;
  right: -10%;
  color: #10B981;
  animation-delay: 0s;
}

.xp-2 {
  bottom: 25%;
  left: -15%;
  color: var(--primary);
  animation-delay: 1.5s;
}

.xp-3 {
  top: 5%;
  left: 5%;
  color: #7C3AED;
  animation-delay: 3s;
}

@keyframes xpFloat {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.9; }
  50% { transform: translateY(-10px) scale(1.05); opacity: 1; }
}

/* --- How It Works --- */
.how-it-works {
  padding: 100px 0;
  background: var(--bg-secondary);
}

@media (min-width: 768px) {
  .how-it-works {
    padding: 120px 0;
  }
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
  }
}

.step-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  position: relative;
  transition: all var(--transition);
}

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

.step-number {
  font-size: 64px;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.15;
  position: absolute;
  top: 16px;
  right: 24px;
}

.step-icon {
  font-size: 48px;
  margin-bottom: 20px;
  line-height: 1;
}

.step-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Features --- */
.features {
  padding: 100px 0;
}

@media (min-width: 768px) {
  .features {
    padding: 120px 0;
  }
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  padding: 32px 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.feature-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: rgba(74, 144, 217, 0.3);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
  line-height: 1;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* --- Rank Showcase --- */
.ranks {
  padding: 100px 0;
  background: var(--bg-secondary);
}

@media (min-width: 768px) {
  .ranks {
    padding: 120px 0;
  }
}

.ranks-track {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 24px 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  -webkit-overflow-scrolling: touch;
}

.ranks-track::-webkit-scrollbar {
  height: 6px;
}

.ranks-track::-webkit-scrollbar-track {
  background: transparent;
}

.ranks-track::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 100px;
}

.rank-card {
  flex-shrink: 0;
  text-align: center;
  padding: 20px 16px;
  min-width: 110px;
  transition: all var(--transition);
}

.rank-card:hover {
  transform: translateY(-4px);
}

.rank-badge {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: all var(--transition);
}

.rank-card:hover .rank-badge {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.rank-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.rank-levels {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.rank-connector {
  width: 24px;
  height: 2px;
  background: var(--border);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .rank-connector {
    width: 32px;
  }

  .rank-card {
    min-width: 120px;
  }
}

.rank-emperor .rank-name {
  background: linear-gradient(135deg, #F59E0B, #D97706);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Waitlist --- */
.waitlist {
  padding: 100px 0;
}

@media (min-width: 768px) {
  .waitlist {
    padding: 120px 0;
  }
}

.waitlist-content {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.waitlist-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  color: var(--text-secondary);
  margin-top: 12px;
  margin-bottom: 36px;
}

.waitlist-form {
  margin-top: 8px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 540px) {
  .form-group {
    flex-direction: row;
  }
}

.form-group input[type="email"] {
  flex: 1;
  padding: 16px 20px;
  font-family: inherit;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card-bg);
  color: var(--text);
  outline: none;
  transition: all var(--transition);
}

.form-group input[type="email"]::placeholder {
  color: var(--text-secondary);
}

.form-group input[type="email"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

.form-group .btn {
  flex-shrink: 0;
}

.form-note {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 14px;
}

/* --- Footer --- */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

@media (min-width: 540px) {
  .footer-container {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-copy {
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.steps-grid .animate-on-scroll:nth-child(2) {
  transition-delay: 0.1s;
}
.steps-grid .animate-on-scroll:nth-child(3) {
  transition-delay: 0.2s;
}

.features-grid .animate-on-scroll:nth-child(2) {
  transition-delay: 0.05s;
}
.features-grid .animate-on-scroll:nth-child(3) {
  transition-delay: 0.1s;
}
.features-grid .animate-on-scroll:nth-child(4) {
  transition-delay: 0.15s;
}
.features-grid .animate-on-scroll:nth-child(5) {
  transition-delay: 0.2s;
}
.features-grid .animate-on-scroll:nth-child(6) {
  transition-delay: 0.25s;
}

/* --- Selection --- */
::selection {
  background: rgba(74, 144, 217, 0.2);
  color: var(--text);
}