/* =========================================================
   OPNet Airdrop Claim — Design System
   Source: Bob (OPNet Instructor MCP) crypto-frontend-design
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Mono:wght@400;700&display=swap');

/* ── CSS Custom Properties ─────────────────────────────── */
:root {
  /* Colors */
  --color-bg:            #050810;
  --color-surface:       #0c1120;
  --color-surface-raised:#131928;
  --color-border:        rgba(255,255,255,0.06);
  --color-border-glow:   rgba(251,140,0,0.35);

  --accent-primary:      #fb8c00;
  --accent-secondary:    #ff5722;
  --accent-cool:         #00e5ff;
  --color-success:       #00e676;
  --color-error:         #ff1744;
  --color-warning:       #ffd740;

  --text-primary:        #f0f4ff;
  --text-secondary:      #8896b0;
  --text-muted:          #4a5568;
  --text-accent:         #fb8c00;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   32px;
  --space-2xl:  48px;
  --space-3xl:  64px;

  /* Typography */
  --font-xs:    0.7rem;
  --font-sm:    0.8rem;
  --font-base:  0.95rem;
  --font-md:    1.05rem;
  --font-lg:    1.25rem;
  --font-xl:    1.5rem;
  --font-2xl:   2rem;
  --font-3xl:   3rem;
  --font-4xl:   4rem;

  /* Radii */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   22px;
  --radius-full: 9999px;

  /* Effects */
  --shadow-glow:    0 0 24px rgba(251,140,0,0.4);
  --shadow-card:    0 8px 40px rgba(0,0,0,0.5), 0 1px 0 rgba(255,255,255,0.04) inset;
  --transition-fast:140ms ease;
  --transition-base:250ms ease;
  --transition-slow:400ms ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--color-bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Background ─────────────────────────────────────────── */
#canvas-bg {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
}

.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
  animation: orbFloat 18s ease-in-out infinite;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #fb8c00 0%, transparent 70%);
  top: -200px; left: -200px;
  animation-delay: 0s;
}
.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #00e5ff 0%, transparent 70%);
  bottom: -150px; right: -150px;
  animation-delay: -9s;
}
.orb-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #ff5722 0%, transparent 70%);
  top: 40%; left: 55%;
  animation-delay: -4s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(40px, -50px) scale(1.05); }
  66%       { transform: translate(-30px, 30px) scale(0.95); }
}

/* ── Layout ─────────────────────────────────────────────── */
#app {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex; flex-direction: column;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(16px);
  background: rgba(5,8,16,0.6);
  position: sticky; top: 0; z-index: 100;
}

.nav-logo {
  display: flex; align-items: center; gap: var(--space-sm);
  text-decoration: none;
}
.nav-logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.nav-logo-text {
  font-size: var(--font-lg);
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cool));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex; gap: var(--space-xl);
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}
.nav-links a:hover { color: var(--text-primary); }

.btn-connect-nav {
  padding: var(--space-sm) var(--space-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: var(--font-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-connect-nav:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
}

.hero-badge {
  display: inline-flex; align-items: center; gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: rgba(251,140,0,0.1);
  border: 1px solid rgba(251,140,0,0.25);
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
  animation: fadeInDown 0.6s ease both;
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(1.4); }
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: var(--space-lg);
  animation: fadeInDown 0.6s 0.1s ease both;
}
.hero-title .gradient-text {
  background: linear-gradient(90deg, var(--accent-primary), #ffab40, var(--accent-cool));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-lg);
  max-width: 560px;
  margin: 0 auto var(--space-xl);
  animation: fadeInDown 0.6s 0.2s ease both;
}

.hero-stats {
  display: flex; justify-content: center; gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
  animation: fadeInDown 0.6s 0.3s ease both;
}
.stat-item { text-align: center; }
.stat-value {
  display: block;
  font-size: var(--font-xl);
  font-weight: 800;
  color: var(--text-primary);
}
.stat-label {
  font-size: var(--font-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── Progress Bar ────────────────────────────────────────── */
.progress-section {
  margin: var(--space-lg) auto;
  max-width: 640px;
  animation: fadeInDown 0.6s 0.4s ease both;
}
.progress-label {
  display: flex; justify-content: space-between;
  font-size: var(--font-sm); color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}
.progress-bar-track {
  height: 8px;
  background: rgba(255,255,255,0.07);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cool));
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 1.4s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 0 12px rgba(251,140,0,0.5);
}

/* ── Main Claim Area ─────────────────────────────────────── */
.claim-section {
  padding: var(--space-lg) var(--space-lg) var(--space-3xl);
  display: flex; flex-direction: column; align-items: center;
}

/* ── Connect Prompt ──────────────────────────────────────── */
.connect-prompt {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  animation: fadeIn 0.4s ease;
}
.connect-icon {
  font-size: 4rem; margin-bottom: var(--space-lg);
  filter: drop-shadow(0 0 20px var(--accent-primary));
  animation: iconFloat 3s ease-in-out infinite;
}
@keyframes iconFloat {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
.connect-prompt h2 {
  font-size: var(--font-2xl); font-weight: 700; margin-bottom: var(--space-sm);
}
.connect-prompt p { color: var(--text-secondary); margin-bottom: var(--space-xl); }

.btn-connect-hero {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-md) var(--space-2xl);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff; border: none;
  border-radius: var(--radius-full);
  font-family: inherit; font-size: var(--font-md); font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 24px rgba(251,140,0,0.3);
}
.btn-connect-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 32px rgba(251,140,0,0.5);
}
.btn-connect-hero:active { transform: translateY(0) scale(0.98); }

/* ── Claim Card (from Bob's design) ─────────────────────── */
.claim-card {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  width: 100%; max-width: 480px;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-card);
  animation: fadeInUp 0.5s ease;
}
.claim-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cool));
}

/* Shimmer loading overlay */
.claim-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.03) 50%, transparent 100%);
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.claim-card.loading::after { opacity: 1; }

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

.claim-card__header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: var(--space-lg);
}
.claim-card__title {
  font-size: var(--font-md); font-weight: 600; color: var(--text-primary);
}

.claim-card__badge {
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-xs); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  transition: all var(--transition-base);
}
.badge-checking {
  background: rgba(255,215,64,0.1); color: var(--color-warning);
  border: 1px solid rgba(255,215,64,0.2);
}
.badge-eligible {
  background: rgba(0,230,118,0.12); color: var(--color-success);
  border: 1px solid rgba(0,230,118,0.25);
  box-shadow: 0 0 12px rgba(0,230,118,0.15);
}
.badge-not-eligible {
  background: rgba(255,23,68,0.1); color: var(--color-error);
  border: 1px solid rgba(255,23,68,0.2);
}
.badge-claimed {
  background: rgba(0,229,255,0.08); color: var(--accent-cool);
  border: 1px solid rgba(0,229,255,0.2);
}

/* Wallet address chip */
.wallet-chip {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}
.wallet-chip .dot {
  width: 8px; height: 8px; background: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--color-success);
}
.wallet-chip .address {
  font-family: 'Space Mono', monospace;
  font-size: var(--font-xs); color: var(--text-secondary);
}

/* Amount display */
.claim-card__amount {
  text-align: center;
  padding: var(--space-xl) 0 var(--space-lg);
}
.amount-value {
  font-size: var(--font-4xl);
  font-weight: 900;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  display: block; line-height: 1;
  background: linear-gradient(135deg, #fff 30%, var(--accent-primary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.amount-token {
  font-size: var(--font-lg); color: var(--text-accent);
  font-weight: 600; margin-top: var(--space-xs);
  display: block;
}
.amount-usd {
  font-size: var(--font-sm); color: var(--text-muted); margin-top: var(--space-xs);
}

/* Countdown */
.countdown-section {
  margin: var(--space-md) 0;
  text-align: center;
}
.countdown-label {
  font-size: var(--font-xs); color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}
.countdown-digits {
  display: flex; justify-content: center; gap: var(--space-sm); align-items: center;
}
.countdown-unit {
  display: flex; flex-direction: column; align-items: center;
}
.countdown-num {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-family: 'Space Mono', monospace;
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
  min-width: 64px;
  text-align: center;
  line-height: 1;
}
.countdown-sep {
  font-size: var(--font-xl); color: var(--text-muted);
  margin-bottom: var(--space-sm);
}
.countdown-unit-label {
  font-size: 0.6rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-top: 4px;
}

/* Details rows */
.claim-card__details {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  margin: var(--space-md) 0;
}
.claim-card__row {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-xs) 0;
}
.claim-card__label { color: var(--text-muted); font-size: var(--font-sm); }
.claim-card__data  { color: var(--text-primary); font-size: var(--font-sm); font-weight: 500; }
.claim-card__data.mono { font-family: 'Space Mono', monospace; font-size: var(--font-xs); }

/* Claim Button */
.btn-claim {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff; border: none;
  border-radius: var(--radius-lg);
  font-family: inherit; font-size: var(--font-md); font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center; gap: var(--space-sm);
  margin-top: var(--space-md);
}
.btn-claim::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}
.btn-claim:hover::before { transform: translateX(100%); }
.btn-claim:hover:not(:disabled) {
  box-shadow: var(--shadow-glow), 0 8px 32px rgba(251,140,0,0.3);
  transform: translateY(-2px);
}
.btn-claim:active:not(:disabled) { transform: translateY(0) scale(0.99); }
.btn-claim:disabled {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
  cursor: not-allowed;
  box-shadow: none;
}

.btn-claim .spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}
.btn-claim.loading .spinner { display: block; }
.btn-claim.loading .btn-text { opacity: 0.6; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Success Overlay ─────────────────────────────────────── */
.success-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(5,8,16,0.92);
  display: none;
  align-items: center; justify-content: center;
  animation: fadeIn 0.3s ease;
}
.success-overlay.active { display: flex; }

.success-box {
  text-align: center;
  background: var(--color-surface-raised);
  border: 1px solid rgba(0,230,118,0.25);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  max-width: 440px; width: 90%;
  position: relative;
  box-shadow: 0 0 60px rgba(0,230,118,0.15);
  animation: slideUp 0.4s cubic-bezier(0.34,1.56,0.64,1) both;
}
.success-icon {
  font-size: 4rem; margin-bottom: var(--space-lg);
  animation: bounceIn 0.6s 0.2s cubic-bezier(0.34,1.56,0.64,1) both;
}
@keyframes bounceIn {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
.success-box h2 { font-size: var(--font-2xl); font-weight: 800; margin-bottom: var(--space-sm); }
.success-box p  { color: var(--text-secondary); margin-bottom: var(--space-lg); }
.tx-hash {
  display: block;
  padding: var(--space-sm) var(--space-md);
  background: rgba(0,229,255,0.06);
  border: 1px solid rgba(0,229,255,0.15);
  border-radius: var(--radius-md);
  font-family: 'Space Mono', monospace;
  font-size: var(--font-xs); color: var(--accent-cool);
  text-decoration: none; word-break: break-all;
  margin-bottom: var(--space-lg);
  transition: background var(--transition-fast);
}
.tx-hash:hover { background: rgba(0,229,255,0.12); }
.btn-close {
  padding: var(--space-sm) var(--space-xl);
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--color-border); border-radius: var(--radius-full);
  color: var(--text-primary); font-family: inherit; font-size: var(--font-sm);
  font-weight: 600; cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-close:hover { background: rgba(255,255,255,0.14); }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-section {
  padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
  max-width: 720px; margin: 0 auto;
}
.faq-section h2 {
  text-align: center;
  font-size: var(--font-2xl); font-weight: 700;
  margin-bottom: var(--space-xl);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}
.faq-question {
  width: 100%; background: none; border: none;
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-md) 0;
  color: var(--text-primary); font-family: inherit;
  font-size: var(--font-base); font-weight: 500;
  cursor: pointer; text-align: left;
  transition: color var(--transition-fast);
}
.faq-question:hover { color: var(--text-accent); }
.faq-chevron {
  font-size: 1.1rem; color: var(--text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}
.faq-item.open .faq-chevron { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
  color: var(--text-secondary); font-size: var(--font-sm); line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: var(--space-md);
}

/* ── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  color: var(--text-muted); font-size: var(--font-sm);
}
footer a { color: var(--text-secondary); text-decoration: none; transition: color var(--transition-fast); }
footer a:hover { color: var(--accent-primary); }
.footer-links { display: flex; justify-content: center; gap: var(--space-lg); margin-bottom: var(--space-md); flex-wrap: wrap; }

/* ── Keyframes ───────────────────────────────────────────── */
@keyframes fadeIn      { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInDown  { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: none; } }
@keyframes fadeInUp    { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes slideUp     { from { opacity: 0; transform: translateY(40px) scale(0.96); } to { opacity: 1; transform: none; } }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-stats { gap: var(--space-lg); }
  .amount-value { font-size: clamp(2rem, 10vw, 3rem); }
  .countdown-num { min-width: 48px; font-size: var(--font-lg); padding: var(--space-sm); }
  .navbar { padding: var(--space-md) var(--space-lg); }
}