*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root,
:root[data-theme="light"] {
  --bg: #f0f2f5;
  --surface: #ffffff;
  --surface2: #e9edef;
  --border: #e9edef;
  --accent: #25d366;
  --accent-hover: #1fa855;
  --accent-rgb: 37, 211, 102;
  --danger: #ea4335;
  --success: #00a884;
  --success-rgb: 0, 168, 132;
  --text: #111b21;
  --text-muted: #667781;
  --radius: 1rem;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

:root[data-theme="dark"] {
  --bg: #0b141a;
  --surface: #1f2c34;
  --surface2: #2a3942;
  --border: #2a3942;
  --accent: #25d366;
  --accent-hover: #3ddb82;
  --accent-rgb: 37, 211, 102;
  --danger: #ea4335;
  --success: #00a884;
  --success-rgb: 0, 168, 132;
  --text: #e9edef;
  --text-muted: #8696a0;
  --radius: 1rem;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

body {
  background: var(--bg);
  color: var(--text);
  transition:
    background 0.2s,
    color 0.2s;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── Site Header ── */
.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}

.logo i {
  color: var(--accent);
  font-size: 1.25rem;
}

.site-nav {
  display: flex;
  gap: 2px;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 11px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-muted);
  transition:
    background 0.15s,
    color 0.15s;
  white-space: nowrap;
}

.nav-link:hover {
  background: var(--surface2);
  color: var(--text);
}
.nav-link.active {
  background: rgba(var(--accent-rgb), 0.15);
  color: var(--accent);
}

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

/* ── Buttons ── */
button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition:
    background 0.15s,
    opacity 0.15s;
}

button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:not(:disabled):hover {
  background: var(--accent-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:not(:disabled):hover {
  background: var(--surface2);
  color: var(--text);
}

.btn-success {
  background: rgba(var(--success-rgb), 0.15);
  color: var(--success);
  border: 1px solid rgba(var(--success-rgb), 0.3);
}
.btn-success:not(:disabled):hover {
  background: rgba(var(--success-rgb), 0.28);
}

.btn-danger {
  background: rgba(224, 82, 96, 0.15);
  color: var(--danger);
  border: 1px solid rgba(224, 82, 96, 0.3);
}
.btn-danger:not(:disabled):hover {
  background: rgba(224, 82, 96, 0.28);
}

.btn-icon {
  padding: 8px;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-icon:not(:disabled):hover {
  background: var(--surface2);
  color: var(--text);
}

/* ── Drop Zone ── */
.drop-zone {
  flex: 1;
  display: flex;
  border: 2px dashed var(--border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 48px 24px;
  text-align: center;
}

.drop-box {
  border: 2px dashed var(--accent);
  border-radius: 18px;
  padding: 56px 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: rgba(var(--accent-rgb), 0.06);
  transition:
    border-color 0.2s,
    background 0.2s;
  cursor: pointer;
  max-width: 480px;
  width: 100%;
}

.drop-box:hover,
.drop-box.dragover {
  border-color: var(--accent-hover);
  background: rgba(var(--accent-rgb), 0.12);
}

.drop-box i {
  font-size: 3rem;
  color: var(--accent);
}
.drop-box button i {
  font-size: inherit;
  color: inherit;
}
.drop-box h2 {
  font-size: 1.2rem;
  font-weight: 600;
}
.drop-box p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.privacy-note {
  color: var(--text-muted);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Popup Overlay ── */
.popup-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.popup-overlay.open {
  display: flex;
}

.popup-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  width: min(420px, calc(100vw - 32px));
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow);
}

.popup-box h3 {
  font-size: 1rem;
  font-weight: 600;
}

.popup-box input,
.popup-box select {
  width: 100%;
  padding: 10px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
}

.popup-box input:focus,
.popup-box select:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}

.popup-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.popup-row label {
  color: var(--text-muted);
  font-size: 0.8rem;
  width: 60px;
  flex-shrink: 0;
}
.popup-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

/* ── Toast ── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  max-width: 320px;
  box-shadow: var(--shadow);
  animation: slideIn 0.2s ease;
  pointer-events: all;
}

.toast.error {
  border-left-color: var(--danger);
}
.toast.success {
  border-left-color: var(--success);
}

@keyframes slideIn {
  from {
    transform: translateX(40px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ── Loading ── */
#loading {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 23, 0.75);
  z-index: 500;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
}

#loading.show {
  display: flex;
}

#loading p {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 260px;
  text-align: center;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ── Magic UI-inspired effects ── */
@property --beam-angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

@keyframes beam-spin {
  to {
    --beam-angle: 360deg;
  }
}

/* Shimmer button: a light travels around the perimeter of every primary button */
.btn-primary {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(
    from var(--beam-angle),
    transparent 0deg,
    transparent 300deg,
    rgba(255, 255, 255, 0.95) 335deg,
    transparent 360deg
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: beam-spin 2.6s linear infinite;
  pointer-events: none;
}

/* Rainbow button: glowing animated-gradient border for hero-level CTAs */
.btn-rainbow {
  --rainbow: linear-gradient(
    90deg,
    #ff5770,
    #ffb057,
    #ffe657,
    #57ff8f,
    #57d4ff,
    #7d57ff,
    #ff57e0,
    #ff5770
  );
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  border: 2px solid transparent;
  background-image: linear-gradient(var(--bg), var(--bg)), var(--rainbow);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  background-size:
    100% 100%,
    200% 100%;
  animation: rainbow-slide 5s linear infinite;
}

.btn-rainbow::before {
  content: "";
  position: absolute;
  inset: -8px;
  z-index: -1;
  border-radius: inherit;
  background: var(--rainbow);
  background-size: 200% 100%;
  filter: blur(18px);
  opacity: 0.45;
  animation: rainbow-slide 5s linear infinite;
}

.btn-rainbow:hover::before {
  opacity: 0.65;
}

@keyframes rainbow-slide {
  to {
    background-position:
      -200% 0,
      -200% 0;
  }
}

/* Border beam: rotating light ring, revealed on hover for cards/drop zones */
.card-beam {
  position: relative;
  overflow: hidden;
}

.card-beam::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: conic-gradient(
    from var(--beam-angle),
    transparent 0deg,
    transparent 270deg,
    var(--accent) 320deg,
    #fff 340deg,
    transparent 360deg
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.25s;
  animation: beam-spin 3.2s linear infinite;
  pointer-events: none;
}

.card-beam:hover::after {
  opacity: 1;
}

/* Dot pattern: faint dotted-grid background, fading toward the edges */
.dot-bg {
  position: relative;
}

.dot-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(
    ellipse 65% 55% at 50% 20%,
    black 40%,
    transparent 75%
  );
  mask-image: radial-gradient(
    ellipse 65% 55% at 50% 20%,
    black 40%,
    transparent 75%
  );
  pointer-events: none;
  z-index: 0;
}

.dot-bg > * {
  position: relative;
  z-index: 1;
}

/* Shiny text: light glare pans across a text label */
.shiny-text {
  --shiny-base: var(--text-muted);
  background-image: linear-gradient(
    110deg,
    var(--shiny-base) 40%,
    #fff 50%,
    var(--shiny-base) 60%
  );
  background-size: 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: shiny-pan 3.5s linear infinite;
}

.logo .shiny-text {
  --shiny-base: var(--text);
}

@keyframes shiny-pan {
  to {
    background-position: -250% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn-primary::after,
  .btn-rainbow,
  .btn-rainbow::before,
  .card-beam::after,
  .shiny-text {
    animation: none;
  }
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .site-header {
    padding: 10px 14px;
    gap: 8px;
  }
  .nav-link span {
    display: none;
  }
  .drop-box {
    padding: 36px 24px;
  }
  button span {
    display: none;
  }
  #toast-container {
    left: 12px;
    right: 12px;
    bottom: 12px;
    align-items: stretch;
  }
  .toast {
    max-width: none;
  }
}