@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

/* ─── CSS Variables ─── */
:root {
  --brand-blue:    #033A74;
  --brand-mid:     #0553A1;
  --radius-card: 16px;
  --radius-btn:  10px;
  --transition:  0.25s ease;

  /* light theme (default) */
  --bg:          #f4f7fb;
  --bg-card:     #ffffff;
  --border:      #dde5f0;
  --text-main:   #0a1e3d;
  --text-sub:    #5a7a9e;
  --text-btn:    #ffffff;
  --btn-bg:      #033A74;
  --btn-hover:   #0553A1;
  --shadow:      0 4px 24px rgba(3,58,116,0.10);
  --shadow-btn:  0 4px 14px rgba(3,58,116,0.25);
  --toggle-bg:   #e8f0fa;
  --toggle-text: #033A74;
  --toggle-active-bg:  #033A74;
  --toggle-active-text:#ffffff;
  --success-bg:  #edfaf5;
  --success-border: #b2e8d2;
  --success-text: #0d7a50;
  --error-bg:    #fff0f2;
  --error-border:#ffc5cc;
  --error-text:  #c0192e;
  --loader-track:#dde5f0;
  --loader-spin: #033A74;
  --divider:     #edf1f7;
  --badge-bg:    #e8f0fa;
  --powered:     #8a9db8;
}

[data-theme="dark"] {
  --bg:          #0b1422;
  --bg-card:     #111d2e;
  --border:      #1e3050;
  --text-main:   #ddeeff;
  --text-sub:    #5a82ae;
  --btn-bg:      #1a5db5;
  --btn-hover:   #2270d8;
  --shadow:      0 4px 32px rgba(0,0,0,0.45);
  --shadow-btn:  0 4px 18px rgba(26,93,181,0.35);
  --toggle-bg:   #162035;
  --toggle-text: #7aa3cc;
  --toggle-active-bg:  #1a5db5;
  --toggle-active-text:#ffffff;
  --success-bg:  #0d2b1e;
  --success-border:#165c38;
  --success-text: #3dd68c;
  --error-bg:    #2b0d13;
  --error-border:#5c1622;
  --error-text:  #ff6b80;
  --loader-track:#1e3050;
  --loader-spin: #4499ee;
  --divider:     #1a2d45;
  --badge-bg:    #122040;
  --powered:     #3d5a78;
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 24px;
  transition: background var(--transition), color var(--transition);
}

/* ─── Theme toggle ─── */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  background: var(--toggle-bg);
  border-radius: 30px;
  padding: 4px;
  gap: 2px;
  border: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
  z-index: 100;
}

.theme-toggle button {
  padding: 6px 14px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 600;
  border: none;
  border-radius: 24px;
  cursor: pointer;
  background: transparent;
  color: var(--toggle-text);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.theme-toggle button.active {
  background: var(--toggle-active-bg);
  color: var(--toggle-active-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* ─── Card ─── */
.container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 44px 40px 36px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
  animation: fadeUp 0.5s cubic-bezier(0.22,1,0.36,1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Logo ─── */
.logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 28px;
}

.logo-wrap img {
  height: 42px;
  width: auto;
  object-fit: contain;
  margin-bottom: 14px;
}

[data-theme="dark"] .logo-color { display: none; }
[data-theme="dark"] .logo-white { display: block !important; }
.logo-white { display: none; }

.logo-divider {
  height: 1px;
  width: 100%;
  background: var(--divider);
  margin-bottom: 14px;
  transition: background var(--transition);
}

.powered-text {
  font-size: 12px;
  color: var(--powered);
  transition: color var(--transition);
}

/* ─── Heading ─── */
h1 {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 6px;
  transition: color var(--transition);
}

.subtitle {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 28px;
  transition: color var(--transition);
}

/* ─── Generate button ─── */
#generateBtn {
  width: 100%;
  padding: 14px 24px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-btn);
  background: var(--btn-bg);
  color: var(--text-btn);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

#generateBtn:hover:not(:disabled) {
  background: var(--btn-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(3,58,116,0.3);
}

#generateBtn:active:not(:disabled) { transform: translateY(0); }

#generateBtn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* ─── Loader ─── */
#loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
}

.spinner {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 3px solid var(--loader-track);
  border-top-color: var(--loader-spin);
  animation: spin 0.8s linear infinite;
  transition: border-color var(--transition);
}

.loader-text {
  font-size: 12px;
  color: var(--text-sub);
  font-weight: 500;
}

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

/* ─── Result ─── */
#result {
  opacity: 0;
  transition: opacity 0.4s ease;
  margin-top: 20px;
}
#result.show { opacity: 1; }

.success-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 14px;
  text-align: left;
  transition: background var(--transition), border-color var(--transition);
}

.success-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--success-text);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
  animation: popIn 0.35s cubic-bezier(0.34,1.56,0.64,1) both;
}

@keyframes popIn {
  from { transform: scale(0); }
  to   { transform: scale(1); }
}

.success-msg {
  font-size: 13px;
  font-weight: 600;
  color: var(--success-text);
}

.success-sub {
  font-size: 11.5px;
  color: var(--text-sub);
  margin-top: 2px;
}

/* ─── Download button ─── */
.link-card { display: block; }
.link-card a { text-decoration: none; display: block; }

.link-card button {
  width: 100%;
  padding: 13px 24px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--btn-bg);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.link-card button:hover {
  background: var(--badge-bg);
  border-color: var(--btn-bg);
  transform: translateY(-1px);
}

/* ─── Error ─── */
#error {
  margin-top: 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: 10px;
  color: var(--error-text);
  font-size: 12.5px;
  font-weight: 500;
  padding: 12px 14px;
  text-align: left;
  line-height: 1.4;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

/* ─── Footer ─── */
.footer {
  margin-top: 24px;
  font-size: 11px;
  color: var(--powered);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  transition: color var(--transition);
}

.hidden { display: none !important; }