/* ============================================
   БЮДЖЕТ ТРАКЕР — Светла корпоративна тема (BudgetNest)
   ============================================ */

:root {
  --bg-void: #F4F6F8;
  --bg-panel: #FFFFFF;
  --bg-card: #FFFFFF;
  --border-soft: #E2E8F0;

  /* Допълнителни повърхности (за инпути, hover фонове, ленти) */
  --surface-alt: #F8FAFC;
  --input-bg: #FFFFFF;
  --input-border: #CBD5E1;
  --track-bg: #EDF2F7;

  /* Фирмени цветове от логото BudgetNest */
  --nest-green-dark: #1A3326;   /* Дълбоко горско зелено */
  --nest-green-mid: #254A37;    /* Основно зелено */
  --nest-green-light: #366A4F;  /* Светло зелено */
  --nest-gold: #D4AF37;         /* Златно от логото */
  --nest-gold-accent: #C5A028;  /* Тъмно златно за бутони */

  /* Текст */
  --text-primary: #1A202C;
  --text-secondary: #4A5568;
  --text-dim: #718096;

  /* Системни цветове */
  --color-income: #254A37;
  --color-expense: #E53E3E;

  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
  --btn-shadow: 0 4px 10px rgba(197, 160, 40, 0.2);

  /* Акцентен цвят за заглавия на карти — четим и в двете теми */
  --heading-accent: #1A3326;
}

/* ===== Тъмна тема ===== */
[data-theme="dark"] {
  --bg-void: #0F1E17;
  --bg-panel: #16261D;
  --bg-card: #1C2E23;
  --border-soft: rgba(255, 255, 255, 0.08);

  --surface-alt: #223528;
  --input-bg: #16261D;
  --input-border: #34493C;
  --track-bg: #223528;

  --nest-green-dark: #0C1912;
  --nest-green-mid: #3E7A5A;
  --nest-green-light: #56916D;
  --nest-gold: #E3C067;
  --nest-gold-accent: #D4AF37;

  --text-primary: #F1F5F1;
  --text-secondary: #A9BDAF;
  --text-dim: #6E8577;

  --color-income: #6FCF97;
  --color-expense: #FF8A8A;

  --card-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  --btn-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);

  --heading-accent: #8FCDA8;
}

body { transition: background-color 0.25s ease, color 0.25s ease; }
.page, .card, .summary-card, .overlay-card, .form-side, .brand-side, .navbar,
.field input, .field select, button.submit {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

/* Контраст на brand текста в тъмна тема — светлите цветове от gradienta
   на светлата тема (тъмнозелено -> злато) стават почти невидими на тъмен фон */
[data-theme="dark"] .brand-mark {
  color: var(--text-secondary);
}

[data-theme="dark"] .brand-headline {
  background: linear-gradient(120deg, var(--text-primary) 0%, var(--nest-green-light) 55%, var(--nest-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

/* ===== Бутон за тъмна тема ===== */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--bg-panel);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 17px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--nest-gold-accent);
  border-color: var(--nest-gold-accent);
  transform: translateY(-1px);
}

.theme-toggle:active {
  transform: scale(0.9);
}

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

html, body { height: 100%; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-void);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow-x: hidden;
}

/* Изчистен фон без неонови петна */
.bg-glow {
  display: none;
}

/* Деликатна сива мрежа за фин акцент */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.015) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

/* ===== Страница Вход / Регистрация ===== */
.page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 960px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  overflow: hidden;
  min-height: 580px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.06);
  animation: fadeUp 0.6s ease both;
}

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

/* Ляво брандирано каре */
.brand-side {
  padding: 56px 46px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  background:
    radial-gradient(circle at 20% 15%, rgba(37,74,55,0.04), transparent 55%),
    radial-gradient(circle at 85% 85%, rgba(212,175,55,0.06), transparent 55%),
    var(--bg-panel);
  border-right: 1px solid var(--border-soft);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: none;
  color: var(--nest-green-dark);
}

.brand-mark::before {
  content: "🌱";
  font-size: 16px;
}

.brand-headline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-top: 30px;
  background: linear-gradient(120deg, var(--nest-green-dark) 0%, var(--nest-green-mid) 60%, var(--nest-gold-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-sub {
  margin-top: 18px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 32ch;
}

.brand-stat {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-soft);
  padding-top: 20px;
  line-height: 1.7;
}

.brand-stat b {
  color: var(--nest-green-mid);
  font-weight: 600;
}

/* Дясно каре с формите */
.form-side {
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--bg-panel);
}

.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 34px;
  background: var(--surface-alt);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 5px;
}

.tab {
  flex: 1;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px 0;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}

.tab.active {
  color: #FFFFFF;
  background: var(--nest-green-mid);
}

.form-side form {
  display: none;
  flex-direction: column;
  gap: 24px;
}

.form-side form.active {
  display: flex;
  animation: fadeUp 0.35s ease both;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.field input {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 10px;
  padding: 13px 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus {
  border-color: var(--nest-green-mid);
  box-shadow: 0 0 0 3px rgba(37, 74, 55, 0.1);
}

.field input::placeholder {
  color: #94A3B8;
}

.row-inline {
  display: flex;
  justify-content: flex-end;
  font-size: 13px;
}

.row-inline a {
  color: var(--nest-green-mid);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.row-inline a:hover {
  color: var(--heading-accent);
  text-decoration: underline;
}

button.submit {
  margin-top: 6px;
  position: relative;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: var(--nest-green-dark);
  background: linear-gradient(120deg, #EAD493, var(--nest-gold));
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 10px;
  padding: 15px 20px;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
  box-shadow: var(--btn-shadow);
}

button.submit:hover {
  transform: translateY(-1px);
  background: linear-gradient(120deg, #EAD493, var(--nest-gold-accent));
  box-shadow: 0 6px 14px rgba(197, 160, 40, 0.35);
}

button.submit:active {
  transform: translateY(0);
}

button.submit:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.status-msg {
  font-size: 13px;
  min-height: 18px;
  line-height: 1.5;
}

.status-msg.error   { color: #DC2626; font-weight: 500; }
.status-msg.success { color: var(--nest-green-mid); font-weight: 500; }

.fine-print {
  margin-top: 26px;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
}

@media (max-width: 720px) {
  .page { grid-template-columns: 1fr; }
  .brand-side {
    padding: 40px 32px;
    border-right: none;
    border-bottom: 1px solid var(--border-soft);
  }
  .brand-headline { font-size: 30px; }
  .form-side { padding: 40px 32px; }
}

@media (max-width: 420px) {
  body { padding: 0; align-items: flex-start; }
  .page { border-radius: 0; min-height: 100vh; }
  .brand-side { padding: 32px 22px; }
  .form-side { padding: 32px 22px; }
  .brand-headline { font-size: 26px; }
  .brand-stat { font-size: 12px; }
  .theme-toggle { top: 16px !important; right: 16px !important; }
}