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

:root {
  --accent1: #7f5af0;
  --accent2: #2cb67d;
  --accent3: #ff8906;
  --glass: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.18);
  --text: #fffffe;
  --text-muted: rgba(255,255,255,0.6);
  --danger: #ff4d4d;
  --card-radius: 20px;
  --input-radius: 12px;
}

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100dvh;
  color: var(--text);
  background: #0f0e17;
}

/* ── Background image (used on every page) ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url('../bg.jpg') center/cover no-repeat;
  filter: brightness(0.45);
  z-index: -1;
}

/* ═══════════════════════════════
   LOGIN PAGE
═══════════════════════════════ */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px 16px;
}

.login-wrapper {
  width: 100%;
  max-width: 380px;
  perspective: 1000px;
}

/* 3D card effect */
.login-box {
  position: relative;
  background: rgba(15, 14, 23, 0.55);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 40px 28px 36px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transform-style: preserve-3d;
  transform: rotateX(4deg);
  box-shadow:
    0 2px 0 rgba(255,255,255,0.08) inset,
    0 30px 60px rgba(0,0,0,0.5),
    0 0 0 1px rgba(127,90,240,0.2);
  animation: cardFloat 5s ease-in-out infinite;
}

@keyframes cardFloat {
  0%, 100% { transform: rotateX(4deg) translateY(0); }
  50%       { transform: rotateX(4deg) translateY(-6px); }
}

/* Animated gradient glow behind the card */
.login-glow {
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--card-radius) + 2px);
  background: linear-gradient(135deg, var(--accent1), var(--accent2), var(--accent3), var(--accent1));
  background-size: 300% 300%;
  animation: glowShift 4s linear infinite;
  z-index: -1;
  opacity: 0.7;
  filter: blur(8px);
}

@keyframes glowShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.splitwise-btn {
  position: fixed;
  top: max(20px, env(safe-area-inset-top));
  left: 20px;
  padding: 10px 18px;
  border: 2px solid cyan;
  border-radius: 10px;
  color: cyan;
  text-decoration: none;
  font-size: 0.9rem;
  transition: 0.3s;
  box-shadow: 0 0 10px cyan;
  z-index: 1000;
}

.splitwise-btn:hover {
  background: cyan;
  color: black;
  box-shadow: 0 0 20px cyan;
}

.login-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  text-align: center;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 32px;
}

/* ── Input groups ── */
.input-group {
  margin-bottom: 18px;
}

.input-group label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.input-group input {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--input-radius);
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
  caret-color: var(--accent1);
}

/* Colour-changing border while typing */
.input-group input:focus {
  background: rgba(255,255,255,0.08);
  box-shadow: 0 0 0 2px var(--input-glow, var(--accent1));
  border-color: transparent;
}

/* Login button */
.login-btn {
  width: 100%;
  margin-top: 10px;
  padding: 15px;
  border: none;
  border-radius: var(--input-radius);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  color: white;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
}

.login-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(127,90,240,0.4);
}

.login-btn:active { transform: translateY(0); }

.login-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.15));
  pointer-events: none;
}

.login-error {
  text-align: center;
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 14px;
  min-height: 20px;
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-8px); }
  75%      { transform: translateX(8px); }
}

/* ═══════════════════════════════
   DASHBOARD / INNER PAGES
═══════════════════════════════ */
.page {
  min-height: 100dvh;
  padding: 0 0 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(0,0,0,0.3);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar h2 {
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.topbar-user {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.logout-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
}
.logout-btn:hover { border-color: var(--danger); color: var(--danger); }

.content {
  padding: 28px 20px;
  max-width: 480px;
  margin: 0 auto;
}

/* Toast notification */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-80px);
  background: rgba(44, 182, 125, 0.9);
  color: white;
  padding: 12px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 999;
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1);
  white-space: nowrap;
  backdrop-filter: blur(8px);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* Glass card */
.glass-card {
  background: rgba(15,14,23,0.55);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 24px 20px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  margin-bottom: 16px;
}

/* Big action buttons (main menu) */
.menu-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  margin-bottom: 14px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.menu-btn:hover, .menu-btn:active {
  background: rgba(127,90,240,0.15);
  border-color: var(--accent1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(127,90,240,0.2);
}

.menu-btn .icon {
  font-size: 1.5rem;
  min-width: 36px;
  text-align: center;
}

/* Generic buttons */
.btn {
  padding: 14px 20px;
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  width: 100%;
  margin-bottom: 12px;
  transition: all 0.2s;
}
.btn:hover { background: rgba(127,90,240,0.2); border-color: var(--accent1); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  border: none;
  font-weight: 600;
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(127,90,240,0.4); }

/* Step label */
.step-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: block;
}

/* Input fields (inner pages) */
.form-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--input-radius);
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  margin-bottom: 14px;
  transition: border-color 0.3s, box-shadow 0.3s;
  caret-color: var(--accent1);
}
.form-input:focus {
  border-color: var(--accent1);
  box-shadow: 0 0 0 2px rgba(127,90,240,0.25);
  background: rgba(255,255,255,0.08);
}
.form-input::placeholder { color: rgba(255,255,255,0.3); }

/* Balance display cards (3D boxes) */
.balance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 8px;
}

.balance-card {
  border-radius: 18px;
  padding: 22px 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  transform: perspective(400px) rotateX(6deg);
  transition: transform 0.3s;
}
.balance-card:hover { transform: perspective(400px) rotateX(0deg) translateY(-4px); }

.balance-card.positive {
  background: rgba(44,182,125,0.15);
  border: 1px solid rgba(44,182,125,0.3);
  box-shadow: 0 12px 28px rgba(44,182,125,0.15), 0 2px 0 rgba(44,182,125,0.2) inset;
}
.balance-card.negative {
  background: rgba(255,77,77,0.12);
  border: 1px solid rgba(255,77,77,0.25);
  box-shadow: 0 12px 28px rgba(255,77,77,0.12), 0 2px 0 rgba(255,77,77,0.15) inset;
}

.balance-name {
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.balance-amount {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -1px;
}
.balance-card.positive .balance-amount { color: #2cb67d; }
.balance-card.negative .balance-amount { color: #ff6b6b; }

/* Statement table */
.stmt-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.stmt-table th {
  text-align: left; padding: 10px 8px;
  border-bottom: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stmt-table td { padding: 10px 8px; border-bottom: 1px solid rgba(255,255,255,0.05); vertical-align: top; }
.stmt-table tr:last-child td { border-bottom: none; }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
}
.tag.ahmad { background: rgba(127,90,240,0.25); color: #c4b5fd; }
.tag.arham { background: rgba(255,137,6,0.2); color: #ffc068; }

/* Edit row */
.edit-row { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.edit-input { width: 90px; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--glass-border); background: rgba(255,255,255,0.06); color: var(--text); font-size: 0.85rem; }
.edit-save { padding: 6px 12px; border-radius: 8px; border: none; background: var(--accent2); color: white; font-size: 0.8rem; cursor: pointer; }