/**
 * @file style.css
 * @description Hệ thống thiết kế SoiLương — Giai đoạn 2.
 * Design tokens (CSS custom properties), thang chữ, animations có chủ đích,
 * dark mode, comparison bars, và print stylesheet.
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
  /* Bảng màu "Ngọc trầm" — Light mode */
  --sl-primary: #0D6B5F;
  --sl-primary-hover: #0A5A50;
  --sl-primary-light: #E8F5F2;
  --sl-primary-muted: #B2D8D0;

  --sl-bg: #F4F7F6;
  --sl-surface: #FFFFFF;
  --sl-surface-raised: #F9FBFA;

  --sl-text: #1A2B2A;
  --sl-text-secondary: #5F7A77;
  --sl-text-tertiary: #8FA8A3;

  --sl-border: #D4DDD9;
  --sl-border-light: #E8EDEB;

  --sl-ok: #2E7D5B;
  --sl-ok-bg: #EBF5F0;
  --sl-warn: #B8862F;
  --sl-warn-bg: #FBF4E8;
  --sl-danger: #A83A32;
  --sl-danger-bg: #FAEDEC;

  /* Thang chữ */
  --font-main: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --text-hero: 2.5rem;
  --text-h1: 1.25rem;
  --text-h2: 1rem;
  --text-body: 0.875rem;
  --text-label: 0.75rem;
  --text-caption: 0.6875rem;

  /* Bo góc nhất quán */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  /* Chuyển động */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* Desktop hero number lớn hơn */
@media (min-width: 1024px) {
  :root {
    --text-hero: 3rem;
  }
}

/* ============================================
   DARK MODE
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    --sl-primary: #2AAA95;
    --sl-primary-hover: #35BFA8;
    --sl-primary-light: #152E2A;
    --sl-primary-muted: #1E3D37;

    --sl-bg: #0E1E1C;
    --sl-surface: #162926;
    --sl-surface-raised: #1D3330;

    --sl-text: #DAE5E2;
    --sl-text-secondary: #8AA8A2;
    --sl-text-tertiary: #5F7A74;

    --sl-border: #2A3F3B;
    --sl-border-light: #223532;

    --sl-ok: #4CAF7D;
    --sl-ok-bg: #1A3329;
    --sl-warn: #D4A03A;
    --sl-warn-bg: #2E2815;
    --sl-danger: #D45A52;
    --sl-danger-bg: #301A18;
  }
}

/* ============================================
   BASE STYLES
   ============================================ */

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  font-size: var(--text-body);
  color: var(--sl-text);
  background: var(--sl-bg);
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

/* Tabular nums cho số tiền — số thẳng hàng khi giá trị thay đổi */
.sl-num {
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

::selection {
  background: var(--sl-primary-light);
  color: var(--sl-primary);
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--sl-border);
  border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--sl-text-tertiary);
}

/* ============================================
   TYPOGRAPHY UTILITIES
   ============================================ */

.sl-hero {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.sl-h1 {
  font-size: var(--text-h1);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.sl-h2 {
  font-size: var(--text-h2);
  font-weight: 600;
  line-height: 1.4;
}

.sl-body {
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.6;
}

.sl-label {
  font-size: var(--text-label);
  font-weight: 500;
  line-height: 1.4;
  color: var(--sl-text-secondary);
}

.sl-caption {
  font-size: var(--text-caption);
  font-weight: 400;
  line-height: 1.4;
  color: var(--sl-text-tertiary);
}

/* ============================================
   SURFACES & CARDS
   ============================================ */

.sl-card {
  background: var(--sl-surface);
  border: 1px solid var(--sl-border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.sl-card-flush {
  /* Card không viền, không shadow — chỉ dùng cho hero/verdict */
  background: var(--sl-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

/* ============================================
   BUTTONS
   ============================================ */

.sl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--text-label);
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 0.625rem 1.125rem;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  border: none;
  outline: none;
  line-height: 1;
}

.sl-btn:focus-visible {
  outline: 2px solid var(--sl-primary);
  outline-offset: 2px;
}

.sl-btn:active {
  transform: scale(0.97);
}

.sl-btn-primary {
  background: var(--sl-primary);
  color: #FFFFFF;
}

.sl-btn-primary:hover {
  background: var(--sl-primary-hover);
}

.sl-btn-secondary {
  background: var(--sl-surface-raised);
  color: var(--sl-text);
  border: 1px solid var(--sl-border);
}

.sl-btn-secondary:hover {
  background: var(--sl-border-light);
}

.sl-btn-ghost {
  background: transparent;
  color: var(--sl-text-secondary);
}

.sl-btn-ghost:hover {
  background: var(--sl-surface-raised);
  color: var(--sl-text);
}

.sl-btn-danger {
  background: transparent;
  color: var(--sl-danger);
}

.sl-btn-danger:hover {
  background: var(--sl-danger-bg);
}

/* ============================================
   FORM INPUTS
   ============================================ */

.sl-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--sl-text);
  background: var(--sl-surface);
  border: 1px solid var(--sl-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.sl-input::placeholder {
  color: var(--sl-text-tertiary);
}

.sl-input:focus {
  border-color: var(--sl-primary);
  box-shadow: 0 0 0 3px var(--sl-primary-light);
}

.sl-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235F7A77' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  padding-right: 2rem;
}

/* ============================================
   COMPARISON BAR — "Chữ ký" thị giác SoiLương
   Thanh đối chiếu trực quan: baseline vs tháng này
   ============================================ */

.sl-compare {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}

.sl-compare-row {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 22px;
}

.sl-compare-label {
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--sl-text-secondary);
  width: 72px;
  flex-shrink: 0;
  text-align: right;
}

.sl-compare-track {
  flex: 1;
  height: 8px;
  background: var(--sl-border-light);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.sl-compare-fill {
  height: 100%;
  border-radius: 4px;
  transition: width var(--duration-slow) var(--ease-out);
  min-width: 2px;
}

.sl-compare-fill--baseline {
  background: var(--sl-text-tertiary);
  opacity: 0.5;
}

.sl-compare-fill--current-ok {
  background: var(--sl-ok);
}

.sl-compare-fill--current-warn {
  background: var(--sl-warn);
}

.sl-compare-fill--current-danger {
  background: var(--sl-danger);
}

.sl-compare-fill--current-missing {
  /* Thanh trống — biến mất */
  background: repeating-linear-gradient(
    90deg,
    var(--sl-danger) 0px,
    var(--sl-danger) 4px,
    transparent 4px,
    transparent 8px
  );
  opacity: 0.6;
}

.sl-compare-value {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--sl-text);
  width: 90px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* ============================================
   STATUS BADGES
   ============================================ */

.sl-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-caption);
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 9999px;
  line-height: 1.4;
}

.sl-badge-ok {
  background: var(--sl-ok-bg);
  color: var(--sl-ok);
}

.sl-badge-warn {
  background: var(--sl-warn-bg);
  color: var(--sl-warn);
}

.sl-badge-danger {
  background: var(--sl-danger-bg);
  color: var(--sl-danger);
}

.sl-badge-neutral {
  background: var(--sl-surface-raised);
  color: var(--sl-text-secondary);
  border: 1px solid var(--sl-border-light);
}

/* ============================================
   ANIMATIONS — có chủ đích, chuỗi mạch lạc
   ============================================ */

/* Count-up effect trên hero number */
@keyframes sl-fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sl-anim-in {
  animation: sl-fade-up var(--duration-normal) var(--ease-out) both;
}

/* Stagger delay cho danh sách khoản mục */
.sl-stagger > * {
  opacity: 0;
  animation: sl-fade-up var(--duration-normal) var(--ease-out) both;
}

.sl-stagger > *:nth-child(1) { animation-delay: 0ms; }
.sl-stagger > *:nth-child(2) { animation-delay: 50ms; }
.sl-stagger > *:nth-child(3) { animation-delay: 100ms; }
.sl-stagger > *:nth-child(4) { animation-delay: 150ms; }
.sl-stagger > *:nth-child(5) { animation-delay: 200ms; }
.sl-stagger > *:nth-child(6) { animation-delay: 250ms; }
.sl-stagger > *:nth-child(7) { animation-delay: 300ms; }
.sl-stagger > *:nth-child(8) { animation-delay: 350ms; }
.sl-stagger > *:nth-child(9) { animation-delay: 400ms; }
.sl-stagger > *:nth-child(10) { animation-delay: 450ms; }

/* Tick nảy nhẹ khi tháng bình thường */
@keyframes sl-check-bounce {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.sl-check-anim {
  animation: sl-check-bounce 0.4s var(--ease-out) both;
}

/* Skeleton loading */
@keyframes sl-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.sl-skeleton {
  background: linear-gradient(90deg, var(--sl-border-light) 25%, var(--sl-surface-raised) 37%, var(--sl-border-light) 63%);
  background-size: 200% 100%;
  animation: sl-shimmer 1.5s ease infinite;
  border-radius: var(--radius-sm);
}

/* Tôn trọng prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Modal overlay */
.sl-modal-overlay {
  background: rgba(14, 30, 28, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* Tab navigation */
.sl-tab {
  font-size: var(--text-label);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  color: var(--sl-text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  border: none;
  background: transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sl-tab:hover {
  color: var(--sl-text);
  background: var(--sl-surface);
}

.sl-tab--active {
  color: var(--sl-primary);
  background: var(--sl-surface);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

/* ============================================
   LAYOUT — 2 cột trên Desktop
   ============================================ */

.sl-dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 1024px) {
  .sl-dashboard-grid {
    grid-template-columns: 55fr 45fr;
    gap: 1.5rem;
  }

  .sl-col-left {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .sl-col-right {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    /* Sticky để biểu đồ theo scroll trên desktop */
    position: sticky;
    top: 80px;
    align-self: start;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
  }
}

/* ============================================
   HEADER
   ============================================ */

.sl-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--sl-surface);
  border-bottom: 1px solid var(--sl-border-light);
}

@media (prefers-color-scheme: dark) {
  .sl-header {
    background: var(--sl-surface);
  }
}

/* ============================================
   TOAST
   ============================================ */

.sl-toast {
  font-size: var(--text-label);
  font-weight: 500;
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  pointer-events: auto;
  transform: translateY(8px);
  opacity: 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.sl-toast--visible {
  transform: translateY(0);
  opacity: 1;
}

.sl-toast-ok { background: var(--sl-ok); color: #fff; }
.sl-toast-error { background: var(--sl-danger); color: #fff; }
.sl-toast-warn { background: var(--sl-warn); color: #fff; }
.sl-toast-info { background: var(--sl-primary); color: #fff; }

/* ============================================
   LUCIDE ICONS
   ============================================ */

.sl-icon {
  width: 18px;
  height: 18px;
  stroke-width: 1.75;
  flex-shrink: 0;
}

.sl-icon-sm {
  width: 14px;
  height: 14px;
}

.sl-icon-lg {
  width: 22px;
  height: 22px;
}

/* ============================================
   PRINT
   ============================================ */

@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 11pt;
  }

  .sl-header, nav, #toast-container, .sl-btn, input[type="file"], .no-print {
    display: none !important;
  }

  main {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .sl-card {
    border: 1px solid #e5e7eb !important;
    box-shadow: none !important;
    break-inside: avoid;
  }
}