/* ============================================================
   Family Loan Tracker – Custom CSS
   Tailwind handles utilities; this file covers what it can't.
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

/* ── Root variables ───────────────────────────────────────── */
:root {
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', monospace;

  /* Light */
  --bg-base:       #f8f7ff;
  --bg-card:       #ffffff;
  --bg-sidebar:    #ffffff;
  --border:        #e5e3f3;
  --text-primary:  #1a1836;
  --text-muted:    #6b6892;
  --scrollbar-thumb: #c5c3e0;
  --scrollbar-track: #f0effe;
}

.dark {
  --bg-base:       #0f0e1a;
  --bg-card:       #19182d;
  --bg-sidebar:    #131220;
  --border:        #2a2847;
  --text-primary:  #f0effe;
  --text-muted:    #8b89b0;
  --scrollbar-thumb: #3d3b60;
  --scrollbar-track: #13122a;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-base);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ── Numeric / mono values ────────────────────────────────── */
.font-mono { font-family: var(--font-mono); }

/* ── Card base ────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 32px rgba(79, 70, 229, 0.10);
  transform: translateY(-2px);
}

.dark .card:hover {
  box-shadow: 0 8px 32px rgba(99, 91, 255, 0.18);
}

/* ── Sidebar ──────────────────────────────────────────────── */
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* ── Nav link ─────────────────────────────────────────────── */
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.875rem;
  border-radius: 0.625rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease;
}

.nav-link:hover {
  background: rgba(99, 91, 255, 0.08);
  color: #6366f1;
}

.nav-link.active {
  background: rgba(99, 91, 255, 0.12);
  color: #6366f1;
  font-weight: 600;
}

.dark .nav-link.active {
  background: rgba(99, 91, 255, 0.18);
  color: #a5b4fc;
}

/* ── Bottom tab bar (mobile) ──────────────────────────────── */
.bottom-nav {
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border);
  transition: background-color 0.3s ease;
}

.bottom-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.18s ease;
  flex: 1;
}

.bottom-tab.active,
.bottom-tab:hover {
  color: #6366f1;
}

.dark .bottom-tab.active {
  color: #a5b4fc;
}

/* ── Circular progress ring ───────────────────────────────── */
.progress-ring__track {
  transition: stroke 0.3s ease;
}

.progress-ring__fill {
  transform-origin: 50% 50%;
  transform: rotate(-90deg);
  transition: stroke-dashoffset 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  stroke-linecap: round;
}

/* ── Urgency banner ───────────────────────────────────────── */
.urgency-banner {
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.urgency-banner.green  { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.urgency-banner.amber  { background: #fffbeb; color: #b45309; border: 1px solid #fde68a; }
.urgency-banner.red    { background: #fff1f2; color: #be123c; border: 1px solid #fecdd3; }

.dark .urgency-banner.green  { background: rgba(21,128,61,0.12); color: #86efac; border-color: rgba(134,239,172,0.25); }
.dark .urgency-banner.amber  { background: rgba(180,83,9,0.12);  color: #fcd34d; border-color: rgba(252,211,77,0.25); }
.dark .urgency-banner.red    { background: rgba(190,18,60,0.12); color: #fda4af; border-color: rgba(253,164,175,0.25); }

/* ── Stat card number ─────────────────────────────────────── */
.stat-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

@media (min-width: 1024px) {
  .stat-value { font-size: 1.85rem; }
}

/* ── Payment form input ───────────────────────────────────── */
.pay-input {
  width: 100%;
  background: var(--bg-base);
  border: 2px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  -moz-appearance: textfield;
}

.pay-input::-webkit-outer-spin-button,
.pay-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.pay-input:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
}

.pay-input::placeholder { color: var(--text-muted); opacity: 0.7; }

/* ── Slide-down for custom date field ─────────────────────── */
.slide-down {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease,
              margin-top 0.25s ease;
  margin-top: 0;
}

.slide-down.open {
  max-height: 120px;
  opacity: 1;
  margin-top: 0.75rem;
}

/* ── Primary button ───────────────────────────────────────── */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.875rem 1.5rem;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 0.75rem;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ── Loading skeleton ─────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.skeleton {
  border-radius: 0.5rem;
  background: linear-gradient(90deg,
    var(--border) 25%,
    rgba(99,91,255,0.06) 50%,
    var(--border) 75%
  );
  background-size: 800px 100%;
  animation: shimmer 1.6s infinite linear;
}

/* ── Milestone banner ─────────────────────────────────────── */
@keyframes slide-in-down {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}

.milestone-banner {
  animation: slide-in-down 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  border-radius: 0.75rem;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

/* ── Custom scrollbar ─────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 3px; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #6366f1; }

/* ── Chart containers ─────────────────────────────────────── */
.chart-wrap {
  position: relative;
  width: 100%;
  min-height: 220px;
}

/* ── Streak card ──────────────────────────────────────────── */
.streak-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem 0.5rem;
  flex: 1;
}

.streak-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: #6366f1;
}

.dark .streak-value { color: #a5b4fc; }

.streak-label {
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
}

/* ── Section heading ──────────────────────────────────────── */
.section-heading {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ── Toggle switch ────────────────────────────────────────── */
.toggle-track {
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: var(--border);
  position: relative;
  cursor: pointer;
  transition: background 0.2s ease;
}

.toggle-track.on { background: #6366f1; }

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toggle-track.on .toggle-thumb { transform: translateX(18px); }

/* ── Page fade-in ─────────────────────────────────────────── */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up { animation: fade-up 0.5s ease both; }
.fade-up-1 { animation-delay: 0.05s; }
.fade-up-2 { animation-delay: 0.10s; }
.fade-up-3 { animation-delay: 0.15s; }
.fade-up-4 { animation-delay: 0.20s; }
.fade-up-5 { animation-delay: 0.25s; }

/* ── Divider ──────────────────────────────────────────────── */
.divider { border-color: var(--border); }

/* ── Error state ──────────────────────────────────────────── */
.error-card {
  background: rgba(190,18,60,0.06);
  border: 1px solid rgba(190,18,60,0.2);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  color: #be123c;
  font-size: 0.875rem;
}

.dark .error-card { color: #fda4af; background: rgba(190,18,60,0.12); }

/* ── Checkbox ─────────────────────────────────────────────── */
input[type="checkbox"].styled {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  background: var(--bg-base);
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s ease, background 0.15s ease;
  flex-shrink: 0;
}

input[type="checkbox"].styled:checked {
  background: #6366f1;
  border-color: #6366f1;
}

input[type="checkbox"].styled:checked::after {
  content: '';
  position: absolute;
  top: 1px;
  left: 4px;
  width: 6px;
  height: 10px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}