/* ═══════════════════════════════════════════════════════════════════
   National Fuel Pass System — Material 3 + iOS 26 Liquid Glass Ultra
   Dark theme · Vibrant green · Mobile-first · Glassmorphism Pro
   Version 2.0 — Enhanced UI with device-aware responsive design
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Google Fonts Import ──────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;600;700&family=Google+Sans+Display:wght@400;500;600;700&family=Noto+Sans+Sinhala:wght@300;400;500;600;700&family=Noto+Sans+Tamil:wght@300;400;500;600;700&family=Material+Symbols+Rounded:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

/* ─── Material Symbols (Rounded, modern) ───────────────────────── */
.material-symbols-rounded {
  font-family: 'Material Symbols Rounded';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* ─── CSS Custom Properties ────────────────────────────────────── */
:root {
  /* ── Material 3 Dark Theme – Vivid Green primary ── */
  --md-sys-color-primary: #4ade80;
  --md-sys-color-on-primary: #052e16;
  --md-sys-color-primary-container: #166534;
  --md-sys-color-on-primary-container: #bbf7d0;
  --md-sys-color-primary-glow: rgba(74, 222, 128, 0.35);

  --md-sys-color-secondary: #a8c7fa;
  --md-sys-color-on-secondary: #062e6f;
  --md-sys-color-secondary-container: #1e3a8a;
  --md-sys-color-on-secondary-container: #dbeafe;

  --md-sys-color-tertiary: #f0abfc;
  --md-sys-color-on-tertiary: #4a044e;
  --md-sys-color-tertiary-container: #86198f;
  --md-sys-color-on-tertiary-container: #fae8ff;

  --md-sys-color-error: #f87171;
  --md-sys-color-error-container: #7f1d1d;
  --md-sys-color-on-error: #450a0a;
  --md-sys-color-on-error-container: #fee2e2;

  --md-sys-color-background: #070710;
  --md-sys-color-on-background: #e8e8f0;
  --md-sys-color-surface: #0d0d18;
  --md-sys-color-on-surface: #e8e8f0;
  --md-sys-color-surface-variant: #181828;
  --md-sys-color-on-surface-variant: #9898b0;
  --md-sys-color-outline: #2a2a40;
  --md-sys-color-outline-variant: #1e1e30;

  /* ── iOS 26 Liquid Glass System ── */
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-hover: rgba(255, 255, 255, 0.07);
  --glass-bg-active: rgba(255, 255, 255, 0.10);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-bright: rgba(255, 255, 255, 0.15);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.6), 0 2px 8px rgba(0, 0, 0, 0.4);
  --glass-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.7), 0 4px 20px rgba(0, 0, 0, 0.5);
  --glass-blur: blur(24px) saturate(180%);
  --glass-blur-sm: blur(12px) saturate(160%);
  --glass-blur-lg: blur(40px) saturate(200%);
  --glass-shine: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0.02) 50%, rgba(255,255,255,0.06) 100%);
  --glass-inner-border: inset 0 1px 0 rgba(255,255,255,0.12), inset 0 -1px 0 rgba(0,0,0,0.3);

  /* ── Liquid Glass Card ── */
  --liquid-bg: rgba(15, 15, 30, 0.65);
  --liquid-border: rgba(255, 255, 255, 0.10);
  --liquid-highlight: rgba(255, 255, 255, 0.08);

  /* ── Elevations (M3 tonal) ── */
  --md-sys-elevation-0: none;
  --md-sys-elevation-1: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --md-sys-elevation-2: 0 4px 12px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3);
  --md-sys-elevation-3: 0 8px 24px rgba(0,0,0,0.55), 0 4px 8px rgba(0,0,0,0.35);
  --md-sys-elevation-4: 0 16px 40px rgba(0,0,0,0.6), 0 6px 12px rgba(0,0,0,0.4);

  /* ── Typography ── */
  --font-sans: 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Google Sans Display', 'Google Sans', sans-serif;
  --font-sinhala: 'Noto Sans Sinhala', 'Google Sans', sans-serif;
  --font-tamil: 'Noto Sans Tamil', 'Google Sans', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* ── Spacing ── */
  --sp-2xs: 2px;
  --sp-xs: 4px;
  --sp-sm: 8px;
  --sp-md: 16px;
  --sp-lg: 24px;
  --sp-xl: 32px;
  --sp-2xl: 48px;
  --sp-3xl: 64px;

  /* ── Radii ── */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* ── Transitions ── */
  --transition-fast: 150ms cubic-bezier(0.2, 0, 0, 1);
  --transition-base: 250ms cubic-bezier(0.2, 0, 0, 1);
  --transition-slow: 400ms cubic-bezier(0.2, 0, 0, 1);
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── State Layer Opacity (M3 spec) ── */
  --state-hover: rgba(255,255,255,0.08);
  --state-pressed: rgba(255,255,255,0.12);
  --state-focused: rgba(255,255,255,0.12);

  /* ── Mobile Bottom Nav height ── */
  --bottom-nav-height: 72px;
}

/* ─── Reset & Base ─────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  height: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.5;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html[lang="si"] body { font-family: var(--font-sinhala), var(--font-sans); }
html[lang="ta"] body { font-family: var(--font-tamil), var(--font-sans); }

/* ─── Animated Mesh Background ─────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 60% at 15% 10%, rgba(74, 222, 128, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 5%, rgba(168, 199, 250, 0.14) 0%, transparent 55%),
    radial-gradient(ellipse 70% 60% at 80% 90%, rgba(74, 222, 128, 0.12) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 85%, rgba(168, 199, 250, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse 40% 35% at 50% 50%, rgba(74, 222, 128, 0.06) 0%, transparent 60%);
  filter: blur(60px);
  animation: meshDrift 20s ease-in-out infinite alternate;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(7, 7, 16, 0.4) 0%, rgba(7, 7, 16, 0.0) 30%, rgba(7, 7, 16, 0.0) 70%, rgba(7, 7, 16, 0.6) 100%);
  pointer-events: none;
}

@keyframes meshDrift {
  0%   { transform: scale(1) translate(0, 0); opacity: 0.8; }
  25%  { transform: scale(1.05) translate(1%, 1%); }
  50%  { transform: scale(1.02) translate(-1%, 0.5%); opacity: 1; }
  75%  { transform: scale(1.07) translate(0.5%, -1%); }
  100% { transform: scale(1.03) translate(-0.5%, 1.5%); opacity: 0.85; }
}

/* Subtle noise texture overlay */
body > .noise-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.025;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* ─── Typography — Mobile-first ────────────────────────────────── */
h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 0.75rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg,
    #ffffff 0%,
    #e8f5e9 30%,
    #4ade80 60%,
    #86efac 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4.5vw, 2.2rem);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

h3 {
  font-family: var(--font-sans);
  font-size: clamp(1.1rem, 3.5vw, 1.45rem);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.5rem;
  color: var(--md-sys-color-primary);
}

h4 {
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  font-weight: 600;
  letter-spacing: 0.01em;
}

p {
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  margin-bottom: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

/* ─── Liquid Glass Utility Mixin ────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-inner-border);
}

/* ─── Cards — Liquid Glass Enhanced ───────────────────────────── */
.card {
  background: var(--liquid-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--liquid-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-lg);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

/* Card top-edge shine */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-shine);
  border-radius: inherit;
  pointer-events: none;
  opacity: 0.7;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow-lg), 0 0 30px var(--md-sys-color-primary-glow);
  border-color: rgba(74, 222, 128, 0.2);
}

.card:active {
  transform: translateY(-1px);
}

/* ─── Glassmorphism Card Modifier ───────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur-lg);
  -webkit-backdrop-filter: var(--glass-blur-lg);
  border: 1px solid var(--glass-border-bright);
  border-radius: var(--radius-2xl);
  padding: var(--sp-lg);
  box-shadow: var(--glass-shadow-lg);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-shine);
  pointer-events: none;
}

/* ─── Layout: Container ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

@media (min-width: 640px) {
  .container { padding: 0 var(--sp-lg); }
}
@media (min-width: 1024px) {
  .container { padding: 0 var(--sp-xl); }
}

/* ─── Header — Liquid Glass Bar ────────────────────────────────── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px var(--sp-md);
  background: rgba(7, 7, 16, 0.72);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05), 0 4px 20px rgba(0,0,0,0.4);
  position: sticky;
  top: 0;
  z-index: 200;
  transition: background var(--transition-base);
}

.header.scrolled {
  background: rgba(7, 7, 16, 0.90);
  box-shadow: 0 4px 24px rgba(0,0,0,0.6);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-area img {
  height: 40px;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(74,222,128,0.3));
  transition: filter var(--transition-base);
}
.logo-area:hover img {
  filter: drop-shadow(0 2px 12px rgba(74,222,128,0.5));
}

@media (max-width: 480px) {
  .logo-area img { height: 32px; }
}

.logo-text {
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 2.5vw, 1.2rem);
  font-weight: 700;
  color: var(--md-sys-color-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 130px;
  letter-spacing: -0.01em;
}
@media (min-width: 480px) {
  .logo-text { max-width: none; }
}

.header > div:last-child {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ─── Language Selector ─────────────────────────────────────────── */
.lang-selector {
  display: flex;
  align-items: center;
  gap: 6px;
}
.lang-selector select {
  background: var(--glass-bg);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--glass-border);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.lang-selector select:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-bright);
}
.lang-selector select:focus {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 3px var(--md-sys-color-primary-glow);
}

/* ─── Buttons — M3 + Liquid Glass ──────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 24px;
  height: 48px;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
  white-space: nowrap;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--md-sys-elevation-1), var(--glass-inner-border);
  user-select: none;
  -webkit-user-select: none;
}

/* Ripple layer */
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--state-hover);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: inherit;
}
.btn:hover::after { opacity: 1; }
.btn:active::after { opacity: 0; background: var(--state-pressed); }
.btn:active { transform: scale(0.97); }
.btn:disabled {
  opacity: 0.38;
  pointer-events: none;
  box-shadow: none;
}

/* Primary button */
.btn-primary {
  background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
  border-color: rgba(74,222,128,0.3);
  color: var(--md-sys-color-on-primary);
  box-shadow: 0 4px 16px rgba(74, 222, 128, 0.35), var(--glass-inner-border);
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #6ee7a0 0%, #4ade80 100%);
  box-shadow: 0 6px 24px rgba(74, 222, 128, 0.5), var(--glass-inner-border);
  transform: translateY(-2px);
}
.btn-primary:active:not(:disabled) { transform: translateY(0) scale(0.97); }

/* Tonal button */
.btn-tonal {
  background: var(--md-sys-color-secondary-container);
  border-color: transparent;
  color: var(--md-sys-color-on-secondary-container);
  backdrop-filter: none;
}
.btn-tonal:hover:not(:disabled) {
  background: #253fa3;
  transform: translateY(-2px);
}

/* Outlined */
.btn-outlined {
  background: transparent;
  border: 1.5px solid var(--md-sys-color-outline);
  color: var(--md-sys-color-primary);
  box-shadow: none;
  backdrop-filter: none;
}
.btn-outlined:hover:not(:disabled) {
  background: rgba(74, 222, 128, 0.08);
  border-color: var(--md-sys-color-primary);
}

/* Danger */
.btn-danger {
  background: linear-gradient(135deg, #f87171 0%, #dc2626 100%);
  border-color: rgba(248,113,113,0.3);
  color: #fff;
  box-shadow: 0 4px 14px rgba(248,113,113,0.3);
}
.btn-danger:hover:not(:disabled) {
  box-shadow: 0 6px 22px rgba(248,113,113,0.45);
  transform: translateY(-2px);
}

/* Icon-only */
.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 50%;
}
.btn-icon .material-symbols-rounded,
.btn-icon .material-icons { font-size: 22px; }

/* Mobile: bigger tap targets */
@media (max-width: 480px) {
  .btn { height: 52px; font-size: 1rem; padding: 0 20px; }
  .btn-icon { width: 52px; height: 52px; }
}

/* ─── Material Icons (legacy compat) ────────────────────────────── */
.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* ─── Forms & Inputs — Liquid Glass Floating Labels ─────────────── */
.input-group {
  position: relative;
  margin-bottom: 20px;
  width: 100%;
}

.input-group label {
  position: absolute;
  top: 50%;
  left: 16px;
  transform: translateY(-50%);
  color: var(--md-sys-color-on-surface-variant);
  transition: all var(--transition-base);
  pointer-events: none;
  font-size: 1rem;
  font-weight: 400;
  background: transparent;
  padding: 0 4px;
  z-index: 1;
  letter-spacing: 0.01em;
}

.input-field,
.select-field {
  width: 100%;
  padding: 22px 16px 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--md-sys-color-on-surface);
  font-size: 1rem;
  font-family: inherit;
  font-weight: 400;
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  -webkit-appearance: none;
  appearance: none;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.3), var(--glass-inner-border);
  letter-spacing: 0.01em;
}

/* Mobile: prevent iOS zoom + bigger touch targets */
@media (max-width: 600px) {
  .input-field,
  .select-field {
    font-size: 16px; /* prevents auto-zoom on iOS */
    padding: 24px 14px 10px;
  }
  .input-group label {
    font-size: 0.95rem;
  }
}

.input-field:focus,
.select-field:focus {
  border-color: var(--md-sys-color-primary);
  background: rgba(74, 222, 128, 0.06);
  box-shadow: 0 0 0 4px rgba(74,222,128,0.2), inset 0 2px 6px rgba(0,0,0,0.2);
}

.input-field:focus ~ label,
.input-field:not(:placeholder-shown) ~ label,
.select-field:focus ~ label,
.select-field:not(:placeholder-shown) ~ label {
  top: 10px;
  transform: translateY(0);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--md-sys-color-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.input-field::placeholder { color: transparent; }

/* Error state */
.input-group.error .input-field,
.input-group.error .select-field {
  border-color: var(--md-sys-color-error);
  box-shadow: 0 0 0 3px rgba(248,113,113,0.2);
}
.input-group.error label {
  color: var(--md-sys-color-error);
}
.input-group .helper-text {
  font-size: 0.75rem;
  margin-top: 4px;
  padding-left: 16px;
  color: var(--md-sys-color-on-surface-variant);
  transition: color var(--transition-fast);
}
.input-group.error .helper-text {
  color: var(--md-sys-color-error);
}

/* ─── License Plate Group ───────────────────────────────────────── */
.plate-group {
  display: flex;
  gap: 10px;
  align-items: center;
}
.plate-group .input-group { flex: 1; }
.plate-dash {
  font-size: 1.6rem;
  color: var(--md-sys-color-primary);
  margin-top: -8px;
  font-weight: 300;
  flex-shrink: 0;
}

/* ─── Auth Container ────────────────────────────────────────────── */
.auth-container {
  width: 100%;
  max-width: 480px;
  margin: 24px auto;
}
@media (min-width: 600px) {
  .auth-container { margin: 40px auto; }
}

/* ─── Homepage: Auth Gates ──────────────────────────────────────── */
.auth-gates {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0;
}
@media (min-width: 640px) {
  .auth-gates {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 44px 0;
  }
}

.auth-card {
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
}
.auth-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(74,222,128,0.2);
}
.auth-card h3 {
  margin-bottom: 8px;
  color: var(--md-sys-color-primary);
}
.auth-card p { margin-bottom: 20px; }

.auth-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}
.auth-actions .btn {
  flex: 1;
  min-width: 100px;
  max-width: 160px;
}
@media (max-width: 360px) {
  .auth-actions .btn { max-width: none; width: 100%; }
}

/* ─── Quota Grid ────────────────────────────────────────────────── */
.quota-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 16px;
}
@media (min-width: 480px) {
  .quota-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
  .quota-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
  }
}

.quota-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 14px 12px;
  border-radius: var(--radius-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.quota-item:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(74,222,128,0.2);
}
.quota-item-type {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface);
}
.quota-item-liters {
  background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, #22c55e 100%);
  color: var(--md-sys-color-on-primary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(74,222,128,0.3);
}

/* ─── Status Chip / Badge ───────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid transparent;
  white-space: nowrap;
}
.chip-success {
  background: rgba(74,222,128,0.15);
  color: #4ade80;
  border-color: rgba(74,222,128,0.25);
}
.chip-warning {
  background: rgba(251,191,36,0.15);
  color: #fbbf24;
  border-color: rgba(251,191,36,0.25);
}
.chip-error {
  background: rgba(248,113,113,0.15);
  color: #f87171;
  border-color: rgba(248,113,113,0.25);
}
.chip-info {
  background: rgba(168,199,250,0.15);
  color: #a8c7fa;
  border-color: rgba(168,199,250,0.25);
}

/* ─── Dashboard Grid ────────────────────────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}
@media (min-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 2fr 1fr;
    gap: 24px;
  }
}
@media (min-width: 1024px) {
  .dashboard-grid { gap: 28px; }
}

/* ─── Tab Navigation — Pill Style ──────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 4px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 5px;
  margin-bottom: 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: var(--glass-inner-border);
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  font-family: inherit;
  touch-action: manipulation;
  letter-spacing: 0.01em;
  position: relative;
}
.tab-btn:hover {
  background: var(--state-hover);
  color: var(--md-sys-color-on-surface);
}
.tab-btn.active {
  background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
  color: var(--md-sys-color-on-primary);
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(74,222,128,0.4);
}
.tab-btn .material-symbols-rounded,
.tab-btn .material-icons { font-size: 19px; }

/* Very small screens: icons only */
@media (max-width: 400px) {
  .tab-btn span:not(.material-icons):not(.material-symbols-rounded) { display: none; }
  .tab-btn { padding: 10px 12px; }
}

.tab-content {
  display: none;
  animation: fadeSlideIn 0.3s cubic-bezier(0.2, 0, 0, 1);
}
.tab-content.active { display: block; }

/* ─── Tables — Responsive + Glass ──────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-height: 520px;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 480px;
}
th, td {
  padding: 13px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.875rem;
}
th {
  color: var(--md-sys-color-primary);
  font-weight: 600;
  background: rgba(0,0,0,0.25);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
tr { transition: background var(--transition-fast); }
tbody tr:hover { background: rgba(255,255,255,0.03); }

@media (max-width: 600px) {
  th, td { padding: 11px 8px; font-size: 0.8rem; }
}

/* ─── Alerts & Warnings ─────────────────────────────────────────── */
.system-warning {
  background: rgba(127, 29, 29, 0.4);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  color: var(--md-sys-color-on-error-container);
  padding: 14px 18px;
  border-radius: var(--radius-2xl);
  margin-bottom: 16px;
  display: none;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  border: 1px solid rgba(248,113,113,0.3);
  border-left: 4px solid var(--md-sys-color-error);
  animation: fadeSlideIn 0.3s ease;
}
.system-warning.active { display: flex; }

/* ─── Snackbar / Toast ──────────────────────────────────────────── */
.snackbar {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(30, 30, 50, 0.95);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-bright);
  color: var(--md-sys-color-on-surface);
  padding: 14px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 500;
  box-shadow: var(--glass-shadow-lg);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.25s ease;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  max-width: calc(100vw - 48px);
}
.snackbar.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
@media (min-width: 640px) {
  .snackbar {
    bottom: 24px;
    left: auto;
    right: 24px;
    transform: translateY(100px);
  }
  .snackbar.show { transform: translateY(0); }
}

/* ─── Mobile Bottom Navigation Bar ────────────────────────────────
   Only shown when body.is-mobile is set by JS
   ─────────────────────────────────────────────────────────────── */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background: rgba(7, 7, 16, 0.88);
  backdrop-filter: blur(32px) saturate(200%);
  -webkit-backdrop-filter: blur(32px) saturate(200%);
  border-top: 1px solid var(--glass-border);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.07);
  z-index: 300;
  padding: 0 8px;
  padding-bottom: env(safe-area-inset-bottom);
}

body.is-mobile .bottom-nav {
  display: flex;
  align-items: center;
  justify-content: space-around;
}

body.is-mobile .has-bottom-nav {
  padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  padding: 8px 4px;
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast), transform var(--transition-fast);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  border-radius: var(--radius-sm);
  position: relative;
}
.bottom-nav-item .material-symbols-rounded,
.bottom-nav-item .material-icons {
  font-size: 26px;
  transition: all var(--transition-base);
}
.bottom-nav-item.active {
  color: var(--md-sys-color-primary);
}
.bottom-nav-item.active .material-symbols-rounded,
.bottom-nav-item.active .material-icons {
  font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24;
}

/* Active pill indicator */
.bottom-nav-item.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 32px;
  border-radius: var(--radius-full);
  background: rgba(74,222,128,0.15);
}

.bottom-nav-item:active { transform: scale(0.9); }

/* ─── Floating Action Button (FAB) ─────────────────────────────── */
.fab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
  color: var(--md-sys-color-on-primary);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(74,222,128,0.45), var(--md-sys-elevation-3);
  transition: all var(--transition-spring);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}
.fab .material-symbols-rounded,
.fab .material-icons { font-size: 24px; }
.fab:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 30px rgba(74,222,128,0.55), var(--md-sys-elevation-4);
}
.fab:active { transform: scale(0.95); }

/* FAB extended */
.fab-extended {
  width: auto;
  padding: 0 20px;
  gap: 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ─── Progress Indicator — Linear (M3) ─────────────────────────── */
.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--glass-bg-hover);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}
.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, #4ade80, #86efac);
  transition: width 0.6s cubic-bezier(0.2, 0, 0, 1);
  position: relative;
}
.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 60px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4));
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-60px); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateX(60px); opacity: 0; }
}

/* Indeterminate */
.progress-bar.indeterminate .progress-bar-fill {
  width: 40% !important;
  animation: indeterminate 1.4s infinite cubic-bezier(0.4, 0, 0.6, 1);
}
@keyframes indeterminate {
  0% { left: -40%; }
  100% { left: 100%; }
}

/* ─── Loading Spinner ───────────────────────────────────────────── */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(74,222,128,0.2);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}
.spinner-sm { width: 18px; height: 18px; border-width: 2px; }
.spinner-lg { width: 36px; height: 36px; border-width: 4px; }

/* ─── Reveal Animation ──────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.2, 0, 0, 1), transform 0.6s cubic-bezier(0.2, 0, 0, 1);
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.2, 0, 0, 1), transform 0.5s cubic-bezier(0.2, 0, 0, 1);
}
.reveal-stagger.active > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: none; }
.reveal-stagger.active > *:nth-child(2) { transition-delay: 60ms; opacity: 1; transform: none; }
.reveal-stagger.active > *:nth-child(3) { transition-delay: 120ms; opacity: 1; transform: none; }
.reveal-stagger.active > *:nth-child(4) { transition-delay: 180ms; opacity: 1; transform: none; }
.reveal-stagger.active > *:nth-child(5) { transition-delay: 240ms; opacity: 1; transform: none; }
.reveal-stagger.active > *:nth-child(6) { transition-delay: 300ms; opacity: 1; transform: none; }

/* ─── Page Transition ───────────────────────────────────────────── */
.page-enter {
  animation: pageEnter 0.35s cubic-bezier(0.2, 0, 0, 1) both;
}
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ─── Animations ────────────────────────────────────────────────── */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-6px); }
}
@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(74,222,128,0.2); }
  50%       { box-shadow: 0 0 40px rgba(74,222,128,0.5); }
}
@keyframes slideInBottom {
  from { transform: translateY(24px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}
@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.fade-in      { animation: fadeSlideIn 0.4s ease both; }
.slide-in     { animation: slideInBottom 0.4s cubic-bezier(0.2,0,0,1) both; }
.scale-in     { animation: scaleIn 0.3s cubic-bezier(0.2,0,0,1) both; }
.float-anim   { animation: float 3s ease-in-out infinite; }
.glow-anim    { animation: glow 2s ease-in-out infinite; }
.pulse-anim   { animation: pulse 1.5s ease-in-out infinite; }

/* ─── Skeleton Loader ───────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg,
    rgba(255,255,255,0.04) 0%,
    rgba(255,255,255,0.08) 50%,
    rgba(255,255,255,0.04) 100%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.4s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeletonShimmer {
  0%   { background-position: 200% center; }
  100% { background-position: -200% center; }
}
.skeleton-text { height: 14px; margin-bottom: 8px; border-radius: 4px; }
.skeleton-text:last-child { width: 70%; }
.skeleton-circle { border-radius: 50%; }

/* ─── Modal / Dialog — Liquid Glass ────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px) saturate(150%);
  -webkit-backdrop-filter: blur(8px) saturate(150%);
  z-index: 400;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  animation: fadeIn 0.2s ease both;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Bottom sheet on mobile, centered dialog on desktop */
.modal {
  background: rgba(13, 13, 28, 0.9);
  backdrop-filter: var(--glass-blur-lg);
  -webkit-backdrop-filter: var(--glass-blur-lg);
  border: 1px solid var(--glass-border-bright);
  border-bottom: none;
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  padding: var(--sp-lg);
  width: 100%;
  max-height: 90dvh;
  overflow-y: auto;
  box-shadow: 0 -8px 40px rgba(0,0,0,0.6);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
  position: relative;
}
.modal-overlay.active .modal {
  transform: translateY(0);
}

/* Modal drag handle */
.modal::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 4px;
  background: var(--glass-border-bright);
  border-radius: var(--radius-full);
}

@media (min-width: 640px) {
  .modal-overlay {
    align-items: center;
    padding: var(--sp-lg);
  }
  .modal {
    border-radius: var(--radius-2xl);
    border-bottom: 1px solid var(--glass-border-bright);
    max-width: 480px;
    transform: scale(0.95) translateY(10px);
  }
  .modal::before { display: none; }
  .modal-overlay.active .modal { transform: scale(1) translateY(0); }
}

/* ─── Divider ───────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--glass-border) 20%,
    var(--glass-border-bright) 50%,
    var(--glass-border) 80%,
    transparent 100%);
  margin: var(--sp-lg) 0;
}

/* ─── Utility Classes ───────────────────────────────────────────── */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--md-sys-color-primary); }
.text-muted { color: var(--md-sys-color-on-surface-variant); }
.text-error { color: var(--md-sys-color-error); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.flex-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.flex-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; min-width: 0; }
.w-full { width: 100%; }

/* ─── Responsive 2-col row ──────────────────────────────────────── */
.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 480px) {
  .row-2 { grid-template-columns: 1fr; }
}

/* ─── Form Actions ──────────────────────────────────────────────── */
.form-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: var(--sp-lg);
}
@media (max-width: 600px) {
  .form-actions { flex-direction: column; }
  .form-actions .btn { width: 100%; max-width: none; }
}

/* ─── Device Detection Classes ──────────────────────────────────── */
body.is-mobile .desktop-only { display: none !important; }
body.is-desktop .mobile-only { display: none !important; }

/* ─── Mobile-Specific Overrides ────────────────────────────────── */
@media (max-width: 600px) {
  .card { padding: 16px; border-radius: var(--radius-lg); }

  .quota-circle {
    width: 120px !important;
    height: 120px !important;
  }
  .chart-container { height: 200px !important; }

  .header .logo-text.hide-xs { display: none; }

  .tab-nav { padding: 4px; }

  .quota-grid-2 { grid-template-columns: 1fr !important; }
  .report-summary { grid-template-columns: 1fr !important; }
}

@media (max-width: 480px) {
  .station-dashboard-grid { grid-template-columns: 1fr !important; }
  .verify-card { border-radius: var(--radius-lg); }
}

/* ─── Footer ────────────────────────────────────────────────────── */
footer {
  margin-top: auto;
  text-align: center;
  padding: var(--sp-lg) var(--sp-md);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.8rem;
  border-top: 1px solid var(--glass-border);
  background: rgba(0,0,0,0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  letter-spacing: 0.02em;
}

/* ─── Scrollbar (webkit) ────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(74, 222, 128, 0.4);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--md-sys-color-primary);
}

/* ─── Touch Highlight & Selection ───────────────────────────────── */
a, button { -webkit-tap-highlight-color: transparent; }
::selection {
  background: rgba(74,222,128,0.25);
  color: #fff;
}

/* ─── Images ────────────────────────────────────────────────────── */
img {
  max-width: 100%;
  height: auto;
  display: block;
}
img[src*="logo"], img[src*="svg"] { display: inline-block; }

/* ─── Print ─────────────────────────────────────────────────────── */
@media print {
  body::before, .header, footer, .btn, .bottom-nav { display: none !important; }
  body { background: #fff; color: #000; }
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
    background: #fff;
  }
}

/* ─── Reduced Motion ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  body::before { animation: none; }
}