/* ============================================================
   WINDMEDIA · VOUCHER MUA HÀNG SHOPEE QUA FB
   Design system + motion layer
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  /* Brand (lấy từ logo WindMedia) */
  --brand-green: #05dfb0;
  --brand-cyan:  #1eb6d6;
  --brand-blue:  #3966e9;
  --grad: linear-gradient(135deg, #05dfb0 0%, #1eb6d6 48%, #3966e9 100%);
  --grad-soft: linear-gradient(135deg, rgba(5,223,176,.14) 0%, rgba(57,102,233,.12) 100%);

  /* Surfaces — light */
  --bg:            #f2f7fa;
  --surface:       #ffffff;
  --surface-glass: rgba(255,255,255,.78);
  --surface2:      #f5f9fc;
  --border:        #e2ecf3;
  --border2:       #cddeea;

  /* Text — light */
  --text:           #0a1b28;
  --text-secondary: #47617a;
  --text-muted:     #8ba3b8;

  /* Accents */
  --accent:       #0b7fb8;
  --accent-2:     #0aa38f;
  --accent-soft:  rgba(11,127,184,.09);
  --accent-ring:  rgba(11,127,184,.18);
  --success:      #12a862;
  --error:        #e0384e;
  --error-soft:   rgba(224,56,78,.08);

  /* Elevation */
  --shadow-xs: 0 1px 2px rgba(10,27,40,.05);
  --shadow-sm: 0 2px 6px rgba(10,27,40,.05), 0 1px 2px rgba(10,27,40,.04);
  --shadow:    0 10px 30px -12px rgba(10,50,80,.18), 0 2px 8px rgba(10,27,40,.05);
  --shadow-lg: 0 26px 60px -22px rgba(10,50,80,.30), 0 6px 18px rgba(10,27,40,.07);
  --shadow-brand: 0 12px 30px -10px rgba(30,150,200,.45);

  /* Shape */
  --radius-xl: 22px;
  --radius:    16px;
  --radius-sm: 12px;
  --radius-xs: 10px;

  /* Motion */
  --ease-out:    cubic-bezier(.16, 1, .3, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --ease-inout:  cubic-bezier(.65, 0, .35, 1);
  --t-fast: .16s;
  --t:      .28s;
  --t-slow: .5s;

  --header-h: 64px;
}

[data-theme="dark"] {
  --bg:            #060d16;
  --surface:       #0f1a27;
  --surface-glass: rgba(15,26,39,.78);
  --surface2:      #13202f;
  --border:        rgba(255,255,255,.09);
  --border2:       rgba(255,255,255,.17);

  --text:           #e8f2f9;
  --text-secondary: #9fb6c9;
  --text-muted:     #6c8497;

  --accent:      #3ddbc0;
  --accent-2:    #5aa9ff;
  --accent-soft: rgba(61,219,192,.11);
  --accent-ring: rgba(61,219,192,.22);
  --success:     #34d399;
  --error:       #ff6b7f;
  --error-soft:  rgba(255,107,127,.10);

  --shadow-xs: 0 1px 2px rgba(0,0,0,.4);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.4);
  --shadow:    0 12px 32px -12px rgba(0,0,0,.7), 0 2px 8px rgba(0,0,0,.4);
  --shadow-lg: 0 30px 70px -24px rgba(0,0,0,.85), 0 8px 20px rgba(0,0,0,.5);
  --shadow-brand: 0 14px 34px -12px rgba(30,182,214,.5);

  --grad-soft: linear-gradient(135deg, rgba(5,223,176,.12) 0%, rgba(57,102,233,.14) 100%);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  line-height: 1.55;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--t-slow) var(--ease-out), color var(--t) var(--ease-out);
}

button, input { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

::selection { background: rgba(30,182,214,.25); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border2) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---------- 3. Background ---------- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
  will-change: transform;
}

.aurora-1 {
  width: 46vmax; height: 46vmax;
  background: radial-gradient(circle at 50% 50%, rgba(5,223,176,.55), transparent 68%);
  top: -18vmax; left: -14vmax;
  animation: drift1 22s var(--ease-inout) infinite alternate;
}

.aurora-2 {
  width: 40vmax; height: 40vmax;
  background: radial-gradient(circle at 50% 50%, rgba(57,102,233,.5), transparent 68%);
  bottom: -16vmax; right: -12vmax;
  animation: drift2 26s var(--ease-inout) infinite alternate;
}

.aurora-3 {
  width: 32vmax; height: 32vmax;
  background: radial-gradient(circle at 50% 50%, rgba(30,182,214,.42), transparent 68%);
  top: 42%; left: 38%;
  animation: drift3 30s var(--ease-inout) infinite alternate;
}

[data-theme="dark"] .aurora { opacity: .34; }

@keyframes drift1 {
  0%   { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(9vmax, 6vmax, 0) scale(1.15); }
}
@keyframes drift2 {
  0%   { transform: translate3d(0,0,0) scale(1.1); }
  100% { transform: translate3d(-8vmax, -7vmax, 0) scale(.95); }
}
@keyframes drift3 {
  0%   { transform: translate3d(0,0,0) scale(.9); }
  100% { transform: translate3d(-6vmax, 5vmax, 0) scale(1.2); }
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(10,60,90,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10,60,90,.055) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}

[data-theme="dark"] .bg-grid {
  background-image:
    linear-gradient(to right, rgba(150,220,255,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(150,220,255,.05) 1px, transparent 1px);
}

.bg-noise {
  position: absolute;
  inset: 0;
  opacity: .3;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 4. Top progress bar ---------- */
.topbar-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 300;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t) var(--ease-out);
}

.topbar-progress.active { opacity: 1; }

.topbar-progress span {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(30,182,214,.7);
  border-radius: 0 99px 99px 0;
  transition: width .4s var(--ease-out);
}

/* ---------- 5. Layout ---------- */
.app-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.main {
  flex: 1;
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: 44px 24px 72px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

/* ---------- 6. Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-glass);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t) var(--ease-out), box-shadow var(--t) var(--ease-out), background var(--t) var(--ease-out);
}

.header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 6px 24px -14px rgba(10,50,80,.35);
}

.header-glow {
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%);
  width: min(560px, 90%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-cyan), transparent);
  opacity: 0;
  transition: opacity var(--t) var(--ease-out);
}

.header.scrolled .header-glow { opacity: .65; }

.header-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--header-h);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  border-radius: 14px;
  transition: transform var(--t) var(--ease-spring);
}

.header-logo:active { transform: scale(.97); }

/* Logo mark — crop the WindMedia symbol out of Logo.png */
.logo-mark {
  position: relative;
  display: block;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 12px;
  isolation: isolate;
}

.logo-mark img {
  position: absolute;
  width: 137.6%;
  height: 137.6%;
  left: -28.2%;
  top: -4.3%;
  transition: transform var(--t-slow) var(--ease-spring);
  will-change: transform;
}

.header-logo:hover .logo-mark img { transform: scale(1.1) rotate(-4deg); }

.logo-halo {
  position: absolute;
  inset: -35%;
  z-index: -1;
  background: conic-gradient(from 0deg, transparent, rgba(5,223,176,.55), transparent 45%, rgba(57,102,233,.55), transparent);
  filter: blur(8px);
  opacity: 0;
  transition: opacity var(--t) var(--ease-out);
  animation: spin 6s linear infinite;
}

.header-logo:hover .logo-halo { opacity: .9; }

.logo-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.logo-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.15;
  white-space: nowrap;
}

.logo-title-accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-sub {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .07em;
  text-transform: uppercase;
  line-height: 1.3;
  white-space: nowrap;
}

.header-actions { margin-left: auto; display: flex; gap: 8px; }

.icon-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text-secondary);
  overflow: hidden;
  transition: color var(--t) var(--ease-out), border-color var(--t) var(--ease-out),
              background var(--t) var(--ease-out), transform var(--t) var(--ease-spring);
}

.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent-ring);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

.icon-btn:active { transform: translateY(0) scale(.94); }

/* Theme icon swap */
.theme-icon-wrap {
  position: relative;
  display: grid;
  place-items: center;
  width: 18px; height: 18px;
}

.theme-icon-wrap svg {
  position: absolute;
  transition: transform var(--t-slow) var(--ease-spring), opacity var(--t) var(--ease-out);
}

.icon-sun  { transform: rotate(0) scale(1);       opacity: 1; }
.icon-moon { transform: rotate(-90deg) scale(.4); opacity: 0; }

[data-theme="dark"] .icon-sun  { transform: rotate(90deg) scale(.4); opacity: 0; }
[data-theme="dark"] .icon-moon { transform: rotate(0) scale(1);      opacity: 1; }

/* ---------- 7. Hero ---------- */
.hero { text-align: center; padding: 6px 0 2px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 11px;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid var(--accent-ring);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 18px;
  backdrop-filter: blur(6px);
}

.badge-dot {
  position: relative;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--brand-green);
  flex-shrink: 0;
}

.badge-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--brand-green);
  animation: ping 2.2s var(--ease-out) infinite;
}

@keyframes ping {
  0%   { transform: scale(1);   opacity: .7; }
  70%  { transform: scale(3);   opacity: 0; }
  100% { transform: scale(3);   opacity: 0; }
}

.hero-title {
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.035em;
  margin-bottom: 14px;
}

.gradient-text {
  position: relative;
  background: linear-gradient(110deg, #05dfb0 0%, #1eb6d6 35%, #3966e9 60%, #1eb6d6 85%, #05dfb0 100%);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientPan 9s linear infinite;
}

@keyframes gradientPan {
  0%   { background-position:   0% 50%; }
  100% { background-position: 250% 50%; }
}

.hero-desc {
  font-size: 15.5px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto;
}

.hero-desc strong { color: var(--accent); font-weight: 700; }

.hero-chips {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--surface-glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: var(--shadow-xs);
  transition: transform var(--t) var(--ease-spring), border-color var(--t) var(--ease-out),
              color var(--t) var(--ease-out), box-shadow var(--t) var(--ease-out);
}

.hero-chip:hover {
  transform: translateY(-3px);
  border-color: var(--accent-ring);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.chip-emoji { font-size: 13px; line-height: 1; }

/* ---------- 7b. KOL banner (link ?kol=...) ---------- */
.kol-banner {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 18px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid var(--accent-ring);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: var(--shadow-xs);
  animation: kolIn .5s var(--ease-spring) both;
}

@keyframes kolIn {
  from { opacity: 0; transform: translateY(-8px) scale(.94); }
  to   { opacity: 1; transform: none; }
}

.kol-banner-dot {
  position: relative;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-green);
  flex-shrink: 0;
}

.kol-banner-dot::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1.5px solid var(--brand-green);
  opacity: .55;
  animation: kolPulse 2s var(--ease-out) infinite;
}

@keyframes kolPulse {
  0%   { transform: scale(.7); opacity: .6; }
  70%  { transform: scale(1.5); opacity: 0; }
  100% { transform: scale(1.5); opacity: 0; }
}

.kol-banner-text strong {
  color: var(--accent);
  font-weight: 700;
}

@media (prefers-reduced-motion: reduce) {
  .kol-banner { animation: none; }
  .kol-banner-dot::after { animation: none; opacity: 0; }
}

/* ---------- 8. Cards ---------- */
.converter-card,
.result-card,
.history-item {
  background: var(--surface-glass);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
}

.converter-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--t-slow) var(--ease-out), border-color var(--t) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
}

.converter-card:hover { box-shadow: var(--shadow-lg); }

/* Vệt sáng đi theo con trỏ */
.converter-card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%),
              rgba(30,182,214,.10), transparent 65%);
  opacity: 0;
  transition: opacity var(--t-slow) var(--ease-out);
}

.converter-card.spotlight::before { opacity: 1; }

[data-theme="dark"] .converter-card::before {
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%),
              rgba(61,219,192,.11), transparent 65%);
}

.converter-card > .card-section,
.converter-card > .card-divider { position: relative; z-index: 1; }

/* Slow sheen across the card */
.card-sheen {
  position: absolute;
  top: 0; left: -60%;
  width: 45%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.45), transparent);
  transform: skewX(-18deg);
  pointer-events: none;
  animation: sheen 7s var(--ease-inout) infinite;
  opacity: .8;
}

[data-theme="dark"] .card-sheen {
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.06), transparent);
}

@keyframes sheen {
  0%, 65%  { left: -60%; }
  100%     { left: 130%; }
}

.card-section { padding: 22px 24px; }

.card-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 15%, var(--border) 85%, transparent);
}

.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 14px;
}

.step-num {
  position: relative;
  display: grid;
  place-items: center;
  width: 23px; height: 23px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 3px 10px -3px rgba(30,150,220,.6);
}

.step-num::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1.5px solid var(--brand-cyan);
  opacity: 0;
}

.step-num.active::after { animation: ping 1.6s var(--ease-out) 2; }

/* ---------- 9. Input ---------- */
.input-row { display: flex; gap: 9px; }

.input-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}

.input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--t) var(--ease-out), transform var(--t) var(--ease-spring);
}

.input-wrap:focus-within .input-icon {
  color: var(--accent);
  transform: translateY(-50%) scale(1.1);
}

.shopee-input {
  width: 100%;
  padding: 14px 42px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  outline: none;
  transition: border-color var(--t) var(--ease-out), box-shadow var(--t) var(--ease-out),
              background var(--t) var(--ease-out);
}

.shopee-input::placeholder { color: var(--text-muted); font-weight: 400; }

.shopee-input:hover:not(:focus) { border-color: var(--border2); }

.shopee-input:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 4px var(--accent-ring);
}

.input-wrap.invalid .shopee-input {
  border-color: var(--error);
  box-shadow: 0 0 0 4px var(--error-soft);
}

.input-wrap.shake { animation: shake .42s var(--ease-inout); }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-7px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(2px); }
}

.clear-btn {
  position: absolute;
  right: 11px;
  top: 50%;
  display: grid;
  place-items: center;
  width: 21px; height: 21px;
  border-radius: 50%;
  background: var(--text-muted);
  color: var(--surface);
  opacity: 0;
  transform: translateY(-50%) scale(.4);
  pointer-events: none;
  transition: opacity var(--t) var(--ease-out), transform var(--t) var(--ease-spring),
              background var(--t) var(--ease-out);
}

.clear-btn.show {
  opacity: .75;
  transform: translateY(-50%) scale(1);
  pointer-events: auto;
}

.clear-btn:hover { opacity: 1; background: var(--error); transform: translateY(-50%) scale(1.12); }

.paste-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 17px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface2);
  color: var(--text-secondary);
  font-size: 13.5px;
  font-weight: 700;
  flex-shrink: 0;
  overflow: hidden;
  transition: color var(--t) var(--ease-out), border-color var(--t) var(--ease-out),
              background var(--t) var(--ease-out), transform var(--t) var(--ease-spring),
              box-shadow var(--t) var(--ease-out);
}

.paste-btn:hover {
  color: var(--accent);
  border-color: var(--accent-ring);
  background: var(--accent-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.paste-btn:active { transform: translateY(0) scale(.97); }

/* Feedback slot — animated height */
.feedback-slot {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t) var(--ease-out), margin-top var(--t) var(--ease-out);
  margin-top: 0;
}

.feedback-slot.open {
  grid-template-rows: 1fr;
  margin-top: 10px;
}

.feedback-slot > * { min-height: 0; overflow: hidden; }

.url-preview,
.error-msg {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border-radius: var(--radius-xs);
  font-size: 12.5px;
  font-weight: 600;
  animation: popIn .3s var(--ease-spring);
}

.url-preview {
  background: var(--grad-soft);
  border: 1px solid var(--accent-ring);
  color: var(--text-secondary);
  min-width: 0;
}

.url-preview span {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.preview-check {
  color: var(--success);
  flex-shrink: 0;
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
  animation: drawCheck .4s var(--ease-out) forwards;
}

@keyframes drawCheck { to { stroke-dashoffset: 0; } }

.error-msg {
  background: var(--error-soft);
  border: 1px solid rgba(224,56,78,.24);
  color: var(--error);
}

.error-msg svg { flex-shrink: 0; }

@keyframes popIn {
  from { opacity: 0; transform: translateY(-6px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- 10. Buttons ---------- */
.convert-btn {
  position: relative;
  width: 100%;
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  background: var(--grad);
  background-size: 180% 100%;
  color: #fff;
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: -.01em;
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow-brand);
  transition: transform var(--t) var(--ease-spring), box-shadow var(--t) var(--ease-out),
              opacity var(--t) var(--ease-out), background-position var(--t-slow) var(--ease-out);
}

.convert-btn:hover:not(:disabled) {
  transform: translateY(-3px);
  background-position: 100% 50%;
  box-shadow: 0 18px 40px -12px rgba(30,150,220,.6);
}

.convert-btn:active:not(:disabled) { transform: translateY(-1px) scale(.985); }

.convert-btn:disabled {
  opacity: .42;
  cursor: not-allowed;
  box-shadow: none;
  filter: saturate(.55);
}

.convert-btn.ready { animation: readyPulse 2.6s var(--ease-inout) infinite; }

@keyframes readyPulse {
  0%, 100% { box-shadow: var(--shadow-brand), 0 0 0 0 rgba(30,182,214,.4); }
  50%      { box-shadow: var(--shadow-brand), 0 0 0 10px rgba(30,182,214,0); }
}

/* Shine sweep on hover */
.btn-shine {
  position: absolute;
  top: 0; left: -80%;
  width: 45%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.35), transparent);
  transform: skewX(-20deg);
  pointer-events: none;
  transition: left .7s var(--ease-out);
}

.convert-btn:hover .btn-shine,
.btn-open:hover .btn-shine { left: 130%; }

.btn-content, .btn-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
}

.btn-content svg { transition: transform var(--t) var(--ease-spring); }
.convert-btn:hover:not(:disabled) .btn-content svg { transform: translateX(4px); }

.spinner {
  width: 16px; height: 16px;
  border: 2.5px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

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

/* Ripple */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,.45);
  transform: scale(0);
  animation: rippleOut .6s var(--ease-out) forwards;
  pointer-events: none;
  z-index: 0;
}

.paste-btn .ripple,
.btn-copy .ripple,
.btn-reset .ripple { background: var(--accent-ring); }

@keyframes rippleOut {
  to { transform: scale(2.6); opacity: 0; }
}

/* ---------- 11. Result card ---------- */
.result-card {
  position: relative;
  border: 1.5px solid var(--accent-ring);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: resultIn .55s var(--ease-spring) both;
}

@keyframes resultIn {
  from { opacity: 0; transform: translateY(22px) scale(.96); filter: blur(6px); }
  to   { opacity: 1; transform: translateY(0)    scale(1);   filter: blur(0); }
}

.result-sweep {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(100deg, transparent 30%, rgba(255,255,255,.5) 50%, transparent 70%);
  transform: translateX(-100%);
  animation: sweep 1.1s .25s var(--ease-out) 1;
}

[data-theme="dark"] .result-sweep {
  background: linear-gradient(100deg, transparent 30%, rgba(120,220,255,.1) 50%, transparent 70%);
}

@keyframes sweep { to { transform: translateX(100%); } }

.result-header {
  padding: 16px 24px;
  background: var(--grad-soft);
  border-bottom: 1px solid var(--border);
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  font-weight: 800;
  color: var(--accent);
}

.result-check {
  display: grid;
  place-items: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  flex-shrink: 0;
  animation: checkPop .5s .15s var(--ease-spring) both;
}

.result-check svg {
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
  animation: drawCheck .45s .4s var(--ease-out) forwards;
}

@keyframes checkPop {
  from { transform: scale(0) rotate(-45deg); }
  to   { transform: scale(1) rotate(0); }
}

.result-meta {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  flex: 1;
  min-width: 190px;
  animation: fadeUp .45s var(--ease-out) both;
}

.meta-item:nth-child(1) { animation-delay: .2s; }
.meta-item:nth-child(3) { animation-delay: .3s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.meta-icon {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: 10px;
  background: var(--accent-soft);
  font-size: 15px;
  flex-shrink: 0;
}

.meta-info { display: flex; flex-direction: column; min-width: 0; gap: 1px; }

.meta-label {
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-muted);
}

.meta-value {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  word-break: break-all;
}

.meta-value strong {
  color: var(--accent);
  font-weight: 700;
}

.meta-divider {
  width: 1px;
  height: 38px;
  background: var(--border);
  flex-shrink: 0;
}

.result-link-box {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.result-link-label {
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
}

.result-link-text {
  padding: 13px 15px;
  border-radius: var(--radius-xs);
  background: var(--surface2);
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--text-secondary);
  word-break: break-all;
  max-height: 130px;
  overflow-y: auto;
  overscroll-behavior: contain;
  transition: border-color var(--t) var(--ease-out), background var(--t) var(--ease-out);
}

.result-link-text:hover { border-color: var(--border2); }

.result-actions {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

.action-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 11px 18px;
  border-radius: var(--radius-xs);
  border: 1.5px solid transparent;
  font-size: 13.5px;
  font-weight: 700;
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--t) var(--ease-spring), box-shadow var(--t) var(--ease-out),
              color var(--t) var(--ease-out), background var(--t) var(--ease-out),
              border-color var(--t) var(--ease-out);
}

.action-btn:active { transform: translateY(0) scale(.96); }

.btn-open {
  background: var(--grad);
  background-size: 180% 100%;
  color: #fff;
  box-shadow: var(--shadow-brand);
}

.btn-open:hover {
  transform: translateY(-3px);
  background-position: 100% 50%;
  box-shadow: 0 16px 34px -12px rgba(30,150,220,.6);
}

.btn-copy {
  background: var(--surface2);
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-copy:hover {
  border-color: var(--accent-ring);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

.btn-copy.copied {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
  animation: pop .4s var(--ease-spring);
}

@keyframes pop {
  0%   { transform: scale(1); }
  45%  { transform: scale(1.06); }
  100% { transform: scale(1); }
}

.check-draw polyline {
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
  animation: drawCheck .35s var(--ease-out) forwards;
}

.btn-reset {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-reset:hover {
  border-color: var(--border2);
  color: var(--text-secondary);
  background: var(--surface2);
  transform: translateY(-2px);
}

.btn-danger {
  background: var(--error);
  color: #fff;
  border-color: transparent;
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -10px rgba(224,56,78,.6);
  filter: brightness(1.05);
}

/* ---------- 12. History ---------- */
.history-section { animation: fadeUp .4s var(--ease-out) both; }

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  padding: 0 2px;
}

.history-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .07em;
}

.history-count {
  display: grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-ring);
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
}

.history-clear {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 8px;
  transition: color var(--t) var(--ease-out), background var(--t) var(--ease-out);
}

.history-clear:hover { color: var(--error); background: var(--error-soft); }

.history-list { display: flex; flex-direction: column; gap: 9px; }

.history-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  animation: fadeUp .4s var(--ease-out) both;
  animation-delay: var(--d, 0ms);
  transition: transform var(--t) var(--ease-spring), border-color var(--t) var(--ease-out),
              box-shadow var(--t) var(--ease-out);
}

.history-item:hover {
  transform: translateY(-2px);
  border-color: var(--accent-ring);
  box-shadow: var(--shadow-sm);
}

.history-item.removing {
  animation: itemOut .3s var(--ease-out) forwards;
}

@keyframes itemOut {
  to { opacity: 0; transform: translateX(-24px) scale(.96); }
}

.history-icon {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 11px;
  background: var(--grad-soft);
  border: 1px solid var(--accent-ring);
  font-size: 14px;
  flex-shrink: 0;
}

.history-info { flex: 1; min-width: 0; }

.history-url {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 11.5px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-time {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  margin-top: 2px;
}

.history-actions { display: flex; gap: 6px; flex-shrink: 0; }

.hist-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 6px 11px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 11.5px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  transition: color var(--t) var(--ease-out), border-color var(--t) var(--ease-out),
              background var(--t) var(--ease-out), transform var(--t) var(--ease-spring);
}

.hist-btn:hover {
  color: var(--accent);
  border-color: var(--accent-ring);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.hist-btn:active { transform: scale(.94); }

.hist-btn.done {
  color: #fff;
  background: var(--success);
  border-color: var(--success);
}

/* ---------- 13. Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark-sm { width: 30px; height: 30px; border-radius: 9px; }

.footer-brand-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.3;
}

.footer-brand-text strong {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-brand-text span {
  font-size: 11.5px;
  color: var(--text-muted);
}

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-tag strong { color: var(--text-secondary); font-weight: 700; }

.footer-dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--border2);
}

/* ---------- 14. Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(26px + env(safe-area-inset-bottom, 0px));
  z-index: 400;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  pointer-events: none;
  opacity: 0;
  transform: translateX(-50%) translateY(24px) scale(.92);
  transition: opacity var(--t) var(--ease-out), transform var(--t-slow) var(--ease-spring);
  max-width: calc(100vw - 32px);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

.toast-icon {
  display: grid;
  place-items: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-size: 12px;
  flex-shrink: 0;
}

.toast.error .toast-icon { background: var(--error); }
.toast.info  .toast-icon { background: var(--text-muted); }

/* ---------- 15. Modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(6,16,26,.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--t) var(--ease-out);
}

.modal-backdrop.show { opacity: 1; }

.modal {
  width: 100%;
  max-width: 380px;
  padding: 26px 24px 22px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  text-align: center;
  transform: translateY(16px) scale(.94);
  opacity: 0;
  transition: transform var(--t-slow) var(--ease-spring), opacity var(--t) var(--ease-out);
}

.modal-backdrop.show .modal { transform: translateY(0) scale(1); opacity: 1; }

.modal-icon {
  display: grid;
  place-items: center;
  width: 52px; height: 52px;
  margin: 0 auto 14px;
  border-radius: 16px;
  background: var(--error-soft);
  font-size: 24px;
}

.modal-title {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 7px;
}

.modal-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 9px;
}

.modal-actions .action-btn { flex: 1; }

/* ---------- 16. Reveal on load / scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  filter: blur(4px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out), filter .7s var(--ease-out);
  transition-delay: var(--d, 0ms);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* ---------- 17. Responsive ---------- */
@media (max-width: 768px) {
  .main { padding: 30px 18px 64px; gap: 22px; }
  .hero-desc { font-size: 14.5px; }
}

@media (max-width: 600px) {
  :root { --header-h: 58px; }

  .header-inner { padding: 10px 15px; }
  .logo-mark { width: 36px; height: 36px; border-radius: 11px; }
  .logo-title { font-size: 15px; }
  .logo-sub { font-size: 9.5px; }
  .icon-btn { width: 36px; height: 36px; }

  .main { padding: 22px 14px 84px; gap: 18px; }
  .hero-badge { font-size: 10.5px; margin-bottom: 14px; }
  .hero-title { font-size: clamp(24px, 8vw, 34px); margin-bottom: 10px; }
  .hero-desc { font-size: 13.5px; }
  .hero-chips { gap: 6px; margin-top: 16px; }
  .hero-chip { font-size: 11.5px; padding: 6px 11px; }

  .converter-card, .result-card { border-radius: 18px; }
  .card-section { padding: 16px 15px; }

  .input-row { flex-direction: column; gap: 9px; }
  .shopee-input {
    font-size: 16px;          /* chống iOS tự zoom */
    padding: 15px 42px;
  }
  .paste-btn { justify-content: center; padding: 13px; font-size: 14px; }

  .convert-btn { padding: 16px 20px; font-size: 15.5px; }

  .result-header { padding: 13px 15px; }
  .result-badge { font-size: 12.5px; }
  .result-meta { padding: 14px 15px; flex-direction: column; align-items: flex-start; gap: 12px; }
  .meta-divider { display: none; }
  .meta-item { min-width: 0; width: 100%; }
  .result-link-box { padding: 15px; gap: 11px; }
  .result-link-text { font-size: 11px; max-height: 108px; }

  .result-actions { flex-direction: column; gap: 8px; }
  .action-btn { width: 100%; padding: 13px 16px; font-size: 14px; }
  .btn-open  { order: 1; }
  .btn-copy  { order: 2; }
  .btn-reset { order: 3; }

  .history-item { flex-wrap: wrap; padding: 11px 13px; gap: 10px; }
  .history-actions { flex: 0 0 100%; }
  .hist-btn { flex: 1; padding: 8px; font-size: 12px; }

  .footer { padding: 22px 16px calc(22px + env(safe-area-inset-bottom, 0px)); }
  .footer-meta { flex-direction: column; gap: 5px; }
  .footer-dot { display: none; }

  .toast { bottom: calc(18px + env(safe-area-inset-bottom, 0px)); font-size: 12.5px; }

  .modal-actions { flex-direction: column-reverse; }
}

@media (max-width: 360px) {
  .logo-sub { display: none; }
  .hero-title { font-size: 22px; }
  .card-section { padding: 14px 12px; }
}

/* ============================================================
   17b. TỐI ƯU CẢM GIÁC CHẠM & HIỆU NĂNG TRÊN ĐIỆN THOẠI
   ============================================================ */

/* Trình duyệt di động vẽ một ô xám/xanh mờ đè lên MỌI thứ vừa chạm.
   Trang đã có sẵn hiệu ứng :active và ripple riêng nên ô mặc định đó
   chỉ làm bẩn giao diện. */
button, a, input, select, textarea, label, [role="button"] {
  -webkit-tap-highlight-color: transparent;
}

/* Bỏ độ trễ ~300ms mà trình duyệt dành để chờ xem có phải double-tap
   phóng to hay không — chạm vào là ăn ngay, đỡ cảm giác "đơ". */
button, a, select, .seg-btn, .kol-btn, .switch-row, [role="button"] {
  touch-action: manipulation;
}

@media (max-width: 620px) {
  /* iOS Safari TỰ PHÓNG TO cả trang mỗi khi con trỏ vào ô nhập có
     font nhỏ hơn 16px, và không tự thu lại. Đặt đúng 16px là cách duy
     nhất tắt được nó mà KHÔNG phải chặn pinch-zoom của người dùng. */
  .shopee-input,
  .field-input,
  input[type="text"],
  input[type="url"],
  input[type="search"],
  input[type="password"],
  select,
  textarea {
    font-size: 16px;
  }

  /* Nền aurora: 3 khối blur(90px) chạy animation vô hạn là thứ tốn GPU
     nhất trang. Giảm bán kính blur và bỏ bớt một khối — nhìn gần như
     y hệt vì các khối vốn đã rất mờ, nhưng nhẹ hơn hẳn khi cuộn. */
  .aurora   { filter: blur(58px); opacity: .42; }
  .aurora-3 { display: none; }

  /* mix-blend-mode buộc trình duyệt trộn màu cả tầng nền mỗi khung
     hình. Trên màn điện thoại hạt nhiễu này gần như không thấy. */
  .bg-noise { display: none; }
}

/* ---------- 18. Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; filter: none; }
  .aurora, .card-sheen, .result-sweep { display: none; }
}