:root {
  --deep-blue: #1e2a78;
  --electric-blue: #3a5bff;
  --purple-accent: #6c4cff;
  --dark-bg: #0b0e1a;
  --light-bg: #f5f7fb;

  --radius-lg: 16px;
  --radius-md: 14px;
  --radius-sm: 12px;
  --font-sans: "Cairo", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --transition-fast: 160ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-med: 320ms cubic-bezier(0.2, 0.8, 0.2, 1);

  --bg: var(--dark-bg);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --muted2: rgba(255, 255, 255, 0.58);
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);
  --field-bg: rgba(0, 0, 0, 0.18);
  --field-border: rgba(255, 255, 255, 0.14);
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.45);
  --ring: 0 0 0 4px rgba(58, 91, 255, 0.28), 0 0 0 1px rgba(255, 255, 255, 0.08);
  --neon: 0 0 0 1px rgba(108, 76, 255, 0.22), 0 0 26px rgba(58, 91, 255, 0.28),
    0 0 52px rgba(108, 76, 255, 0.18);
  --primary: linear-gradient(135deg, var(--electric-blue), var(--purple-accent));
  --primary-soft: linear-gradient(135deg, rgba(58, 91, 255, 0.34), rgba(108, 76, 255, 0.28));
}

[data-theme="light"] {
  --bg: var(--light-bg);
  --text: rgba(11, 14, 26, 0.92);
  --muted: rgba(11, 14, 26, 0.72);
  --muted2: rgba(11, 14, 26, 0.56);
  --card-bg: rgba(255, 255, 255, 0.78);
  --card-border: rgba(30, 42, 120, 0.12);
  --field-bg: rgba(245, 247, 251, 0.9);
  --field-border: rgba(30, 42, 120, 0.18);
  --shadow: 0 18px 58px rgba(24, 28, 62, 0.14);
  --ring: 0 0 0 4px rgba(58, 91, 255, 0.16), 0 0 0 1px rgba(30, 42, 120, 0.08);
  --neon: 0 0 0 1px rgba(30, 42, 120, 0.08), 0 10px 30px rgba(58, 91, 255, 0.12);
  --primary-soft: linear-gradient(135deg, rgba(58, 91, 255, 0.14), rgba(108, 76, 255, 0.12));
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: geometricPrecision;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  transition: background-color var(--transition-med), color var(--transition-med);
}

.wrap {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: 40px 0 28px;
}

.wrap::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(58, 91, 255, 0.1), rgba(0, 0, 0, 0) 55%),
    radial-gradient(circle at 0% 40%, rgba(108, 76, 255, 0.08), rgba(0, 0, 0, 0) 60%);
  pointer-events: none;
  opacity: 0.9;
  transition: opacity var(--transition-med);
}

[data-theme="light"] .wrap::before {
  background: radial-gradient(circle at 50% 0%, rgba(58, 91, 255, 0.08), rgba(255, 255, 255, 0) 62%),
    radial-gradient(circle at 0% 40%, rgba(108, 76, 255, 0.06), rgba(255, 255, 255, 0) 66%);
  opacity: 1;
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-grid {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  transform: translate3d(0, 0, 0);
  transition: opacity var(--transition-med);
}

[data-theme="light"] .bg-grid {
  opacity: 0.14;
  background-image: linear-gradient(to right, rgba(30, 42, 120, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 42, 120, 0.06) 1px, transparent 1px);
}

.blob {
  position: absolute;
  width: 720px;
  height: 720px;
  border-radius: 999px;
  filter: blur(48px);
  opacity: 0.42;
  mix-blend-mode: screen;
  animation: drift 18s ease-in-out infinite;
  transform: translate3d(0, 0, 0);
}

.blob-a {
  right: -220px;
  top: -220px;
  background: radial-gradient(circle at 30% 30%, rgba(58, 91, 255, 0.76), rgba(58, 91, 255, 0) 62%),
    radial-gradient(circle at 70% 70%, rgba(108, 76, 255, 0.62), rgba(108, 76, 255, 0) 58%);
}

.blob-b {
  left: -260px;
  bottom: -300px;
  width: 820px;
  height: 820px;
  background: radial-gradient(circle at 40% 40%, rgba(108, 76, 255, 0.64), rgba(108, 76, 255, 0) 62%),
    radial-gradient(circle at 70% 30%, rgba(58, 91, 255, 0.55), rgba(58, 91, 255, 0) 58%);
  animation-duration: 22s;
}

.blob-c {
  left: 30%;
  top: 46%;
  width: 520px;
  height: 520px;
  opacity: 0.22;
  background: radial-gradient(circle at 30% 30%, rgba(58, 91, 255, 0.5), rgba(58, 91, 255, 0) 64%),
    radial-gradient(circle at 70% 70%, rgba(108, 76, 255, 0.44), rgba(108, 76, 255, 0) 60%);
  animation-duration: 26s;
}

[data-theme="light"] .blob {
  opacity: 0.22;
  mix-blend-mode: multiply;
  filter: blur(60px);
}

.vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 20%, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.32) 70%),
    radial-gradient(circle at 50% 120%, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.42) 76%);
  opacity: 0.85;
  transition: opacity var(--transition-med);
}

[data-theme="light"] .vignette {
  background: radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0) 0%, rgba(30, 42, 120, 0.06) 75%),
    radial-gradient(circle at 50% 120%, rgba(255, 255, 255, 0) 0%, rgba(30, 42, 120, 0.08) 76%);
  opacity: 1;
}

@keyframes drift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(16px, -20px, 0) scale(1.04);
  }
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  width: min(980px, calc(100% - 40px));
  margin: 14px auto 0;
  display: flex;
  justify-content: flex-start;
}

.theme-toggle {
  font: inherit;
  border: 0;
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-med), border-color var(--transition-med);
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--neon);
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow: var(--ring), var(--shadow);
}

.theme-toggle__icon {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.22) 68%);
  position: relative;
  flex: 0 0 auto;
  transition: transform var(--transition-med), background var(--transition-med);
}

[data-theme="dark"] .theme-toggle__icon::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 999px;
  background: var(--bg);
  transform: translate3d(5px, -3px, 0);
}

[data-theme="light"] .theme-toggle__icon {
  background: radial-gradient(circle at 40% 40%, rgba(255, 208, 80, 0.92), rgba(255, 208, 80, 0.22) 70%);
  box-shadow: 0 0 0 1px rgba(255, 208, 80, 0.32), 0 0 20px rgba(255, 208, 80, 0.18);
}

.theme-toggle__label {
  font-weight: 800;
  letter-spacing: 0.2px;
  font-size: 13px;
  opacity: 0.86;
}

.hero {
  text-align: center;
  padding: 12px 0 26px;
}

.brand__logo {
  width: 180px;
  height: 180px;
  object-fit: contain;
  display: inline-block;
  filter: drop-shadow(0 22px 40px rgba(0, 0, 0, 0.38));
  transform: scale(1);
  transition: filter var(--transition-med), transform var(--transition-med);
}

[data-theme="light"] .brand__logo {
  transform: scale(2.35);
}

.hero__title {
  margin: 18px 0 8px;
  font-size: clamp(26px, 3.2vw, 40px);
  letter-spacing: 0.2px;
  line-height: 1.25;
  font-weight: 800;
  background: var(--primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.2px;
  font-weight: 500;
}

.card {
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  padding: 18px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background-color var(--transition-med), border-color var(--transition-med), box-shadow var(--transition-med);
}

.form {
  display: block;
}

.form__row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 14px;
}

.field,
.field--grow {
  min-width: 0;
}

.field__label {
  display: block;
  font-weight: 700;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
}

.field__control {
  width: 100%;
  border-radius: var(--radius-sm);
  padding: 12px 12px;
  border: 1px solid var(--field-border);
  background: var(--field-bg);
  color: var(--text);
  outline: none;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast),
    background-color var(--transition-med), color var(--transition-med);
}

.field__control::placeholder {
  color: var(--muted2);
}

.field__control:focus {
  border-color: rgba(58, 91, 255, 0.62);
  box-shadow: var(--ring);
}

.field__control:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.field__hint {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted2);
  line-height: 1.5;
}

.btn {
  width: 100%;
  margin-top: 14px;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  border: 0;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.btn--primary {
  background: var(--primary);
  color: white;
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--neon);
}

.btn--primary:active {
  transform: translateY(0);
  filter: brightness(0.98);
}

.btn:disabled {
  cursor: not-allowed;
  filter: saturate(0.75) brightness(0.92);
  box-shadow: none;
  transform: none;
}

.btn__spinner {
  width: 18px;
  height: 18px;
  margin-inline-start: 10px;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.34);
  border-top-color: rgba(255, 255, 255, 0.92);
  display: none;
  vertical-align: -4px;
  animation: spin 900ms linear infinite;
}

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

.form__note {
  margin: 12px 0 0;
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
}

.result {
  margin-top: 16px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition-med), transform var(--transition-med);
}

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

.result__inner {
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  padding: 18px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.result-card {
  display: grid;
  gap: 10px;
}

.result-card--success {
  background: var(--primary-soft);
  border-radius: var(--radius-md);
  padding: 14px;
}

.result-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.result-subtitle {
  margin: 0;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.6;
}

.download-list {
  display: grid;
  gap: 10px;
  margin-top: 8px;
}

.download {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  text-decoration: none;
  padding: 14px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  background: rgba(0, 0, 0, 0.12);
  color: var(--text);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast),
    background-color var(--transition-med);
}

[data-theme="light"] .download {
  background: rgba(255, 255, 255, 0.72);
}

.download:hover {
  transform: translateY(-1px);
  border-color: rgba(58, 91, 255, 0.42);
  box-shadow: var(--neon);
}

.download:focus-visible {
  outline: none;
  box-shadow: var(--ring), var(--shadow);
}

.download__title {
  font-weight: 800;
  letter-spacing: 0.2px;
}

.download__meta {
  font-size: 12px;
  color: var(--muted2);
  max-width: 48ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.footer {
  padding: 18px 0 26px;
  text-align: center;
  color: var(--muted2);
  font-size: 13px;
  transition: color var(--transition-med);
}

@media (max-width: 720px) {
  .form__row {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}