/* ============================================================
   CloudFrame — Design System
   Version 1.0 | Production-ready CSS foundation
   ============================================================ */

/* ── CSS Variables ── */
:root {
  /* Brand Colors */
  --c-primary:        #0F2B3D;
  --c-primary-mid:    #1A4A5A;
  --c-primary-light:  #2D6B7A;
  --c-accent-teal:    #1A9BB5;
  --c-accent-teal-lt: #E0F4F8;
  --c-gold:           #C9A84C;
  --c-gold-lt:        #FDF3DC;

  /* Semantic Colors */
  --c-success:        #2D9D78;
  --c-success-bg:     #EAFAF4;
  --c-warning:        #D97706;
  --c-warning-bg:     #FFFBEB;
  --c-danger:         #C53030;
  --c-danger-bg:      #FEF2F2;
  --c-info:           #1A6BAF;
  --c-info-bg:        #EFF6FF;

  /* Neutral Palette */
  --c-bg:             #F0F4F8;
  --c-bg-alt:         #E8EEF4;
  --c-surface:        #FFFFFF;
  --c-surface-2:      #F8FAFB;
  --c-border:         #D1DCE8;
  --c-border-light:   #E8EEF5;
  --c-text:           #1A2535;
  --c-text-muted:     #5A6B7E;
  --c-text-light:     #8A99AD;
  --c-text-inv:       #FFFFFF;

  /* Spacing Scale */
  --sp-1: 4px;  --sp-2: 8px;   --sp-3: 12px;  --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px;  --sp-7: 28px;  --sp-8: 32px;
  --sp-10: 40px; --sp-12: 48px; --sp-16: 64px; --sp-20: 80px;

  /* Typography */
  --font-sans:   'Inter', 'PingFang TC', 'Microsoft JhengHei', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'Courier New', monospace;
  --fs-xs:   11px; --fs-sm:   13px; --fs-base: 14px;
  --fs-md:   15px; --fs-lg:   18px; --fs-xl:   22px;
  --fs-2xl:  26px; --fs-3xl:  32px; --fs-4xl:  40px;
  --fw-normal: 400; --fw-medium: 500; --fw-semi: 600; --fw-bold: 700;
  --lh-tight: 1.25; --lh-normal: 1.5; --lh-loose: 1.75;

  /* Radius */
  --r-sm: 6px;  --r-md: 10px; --r-lg: 14px;
  --r-xl: 20px; --r-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(15,43,61,0.08), 0 1px 2px rgba(15,43,61,0.04);
  --shadow-md:  0 4px 12px rgba(15,43,61,0.10), 0 2px 4px rgba(15,43,61,0.06);
  --shadow-lg:  0 12px 32px rgba(15,43,61,0.12), 0 4px 8px rgba(15,43,61,0.06);
  --shadow-xl:  0 24px 48px rgba(15,43,61,0.16);
  --shadow-card: 0 2px 8px rgba(15,43,61,0.08);

  /* Transitions */
  --t-fast: 0.15s ease;
  --t-base: 0.25s ease;
  --t-slow: 0.4s ease;

  /* Layout */
  --nav-h: 64px;
  --sidebar-w: 260px;
  --content-max: 1440px;
}

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

html {
  font-size: var(--fs-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: var(--lh-normal);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ── Typography ── */
h1 { font-size: var(--fs-3xl); font-weight: var(--fw-bold); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-2xl); font-weight: var(--fw-bold); line-height: var(--lh-tight); }
h3 { font-size: var(--fs-xl);  font-weight: var(--fw-semi); line-height: var(--lh-tight); }
h4 { font-size: var(--fs-lg);  font-weight: var(--fw-semi); }
h5 { font-size: var(--fs-md);  font-weight: var(--fw-semi); }
h6 { font-size: var(--fs-base); font-weight: var(--fw-semi); }
p  { line-height: var(--lh-loose); }
small { font-size: var(--fs-sm); }

/* ── Navigation ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: var(--c-primary);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
  display: flex; align-items: center;
}
.navbar-inner {
  width: 100%; max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand {
  display: flex; align-items: center; gap: var(--sp-3);
  text-decoration: none;
}
.brand-logo {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--c-accent-teal) 0%, var(--c-gold) 100%);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-weight: var(--fw-bold); font-size: 18px; color: white;
  flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-size: 17px; font-weight: var(--fw-bold); color: white; letter-spacing: 0.3px; }
.brand-tagline { font-size: 10px; color: rgba(255,255,255,0.5); letter-spacing: 0.8px; text-transform: uppercase; }

.navbar-nav {
  display: flex; align-items: center; gap: var(--sp-1);
}
.nav-link {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm);
  color: rgba(255,255,255,0.7);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  transition: all var(--t-fast);
  cursor: pointer;
}
.nav-link:hover { color: white; background: rgba(255,255,255,0.08); }
.nav-link.active { color: white; background: rgba(255,255,255,0.12); }

.navbar-actions { display: flex; align-items: center; gap: var(--sp-3); }
.navbar-quota {
  display: flex; align-items: center; gap: var(--sp-2);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-full);
  padding: 5px 12px;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.7);
}
.quota-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-success);
  flex-shrink: 0;
}
.navbar-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-accent-teal), var(--c-primary-light));
  border: 2px solid rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: var(--fs-xs); font-weight: var(--fw-bold);
  cursor: pointer; transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  user-select: none;
}
.navbar-avatar:hover {
  border-color: rgba(255,255,255,0.7);
  transform: scale(1.08);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.15);
}

/* ── Page Layout ── */
.page-body {
  padding-top: var(--nav-h);
  min-height: 100vh;
}
.container {
  width: 100%; max-width: var(--content-max);
  margin: 0 auto; padding: 0 var(--sp-6);
}
.container-sm { max-width: 480px; }
.container-md { max-width: 720px; }
.container-lg { max-width: 1080px; }

/* ── Cards ── */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.card-header {
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--c-border-light);
  display: flex; align-items: center; justify-content: space-between;
}
.card-title {
  font-size: var(--fs-md); font-weight: var(--fw-semi);
  color: var(--c-text); display: flex; align-items: center; gap: var(--sp-2);
}
.card-body { padding: var(--sp-6); }
.card-footer {
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--c-border-light);
  background: var(--c-surface-2);
}

.card-section {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--sp-5);
  margin-bottom: var(--sp-4);
}
.card-section-title {
  font-size: var(--fs-sm); font-weight: var(--fw-semi);
  color: var(--c-primary-mid); text-transform: uppercase;
  letter-spacing: 0.8px; margin-bottom: var(--sp-4);
  display: flex; align-items: center; gap: var(--sp-2);
}
.card-section-title .section-num {
  width: 20px; height: 20px;
  background: var(--c-primary-mid);
  color: white; font-size: 10px; font-weight: var(--fw-bold);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--sp-2); padding: 10px 20px;
  border-radius: var(--r-sm); border: 1px solid transparent;
  font-size: var(--fs-sm); font-weight: var(--fw-semi);
  cursor: pointer; transition: all var(--t-fast);
  text-decoration: none; white-space: nowrap; user-select: none;
  line-height: 1;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--c-accent-teal); outline-offset: 2px; }

.btn-primary {
  background: var(--c-primary-mid);
  color: white; border-color: var(--c-primary-mid);
}
.btn-primary:hover:not(:disabled) { background: var(--c-primary); border-color: var(--c-primary); }

.btn-accent {
  background: var(--c-accent-teal);
  color: white; border-color: var(--c-accent-teal);
}
.btn-accent:hover:not(:disabled) { background: #148FA8; }

.btn-gold {
  background: var(--c-gold);
  color: white; border-color: var(--c-gold);
}
.btn-gold:hover:not(:disabled) { background: #B8963E; }

.btn-outline {
  background: transparent;
  color: var(--c-primary-mid); border-color: var(--c-border);
}
.btn-outline:hover:not(:disabled) { background: var(--c-bg); border-color: var(--c-primary-light); }

.btn-ghost {
  background: transparent; color: var(--c-text-muted);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) { background: var(--c-bg); color: var(--c-text); }

.btn-danger {
  background: var(--c-danger); color: white; border-color: var(--c-danger);
}
.btn-danger:hover:not(:disabled) { background: #B02020; }

.btn-sm { padding: 7px 14px; font-size: var(--fs-xs); }
.btn-lg { padding: 14px 28px; font-size: var(--fs-md); }
.btn-xl { padding: 16px 36px; font-size: var(--fs-lg); border-radius: var(--r-md); }
.btn-block { width: 100%; }
.btn-icon { padding: 8px; border-radius: var(--r-sm); }

/* Generate button with gradient */
.btn-generate {
  background: linear-gradient(135deg, var(--c-primary-mid) 0%, var(--c-accent-teal) 100%);
  color: white; border: none;
  padding: 14px 32px; font-size: var(--fs-md);
  font-weight: var(--fw-bold); border-radius: var(--r-md);
  box-shadow: 0 4px 16px rgba(26,74,90,0.3);
  transition: all var(--t-base);
  width: 100%;
}
.btn-generate:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(26,74,90,0.4);
}
.btn-generate:active:not(:disabled) { transform: translateY(0); }
.btn-generate.loading {
  pointer-events: none; opacity: 0.85;
}

/* ── Forms ── */
.form-group { margin-bottom: var(--sp-4); }
.form-label {
  display: block; font-size: var(--fs-sm); font-weight: var(--fw-medium);
  color: var(--c-text); margin-bottom: var(--sp-2);
}
.form-label .required { color: var(--c-danger); margin-left: 2px; }
.form-label .hint { font-weight: var(--fw-normal); color: var(--c-text-muted); font-size: var(--fs-xs); }

.form-control {
  width: 100%; padding: 9px 12px;
  background: var(--c-surface); color: var(--c-text);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm); font-size: var(--fs-sm);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none; line-height: 1.5;
  -webkit-appearance: none; appearance: none;
}
.form-control:hover { border-color: var(--c-primary-light); }
.form-control:focus {
  border-color: var(--c-accent-teal);
  box-shadow: 0 0 0 3px rgba(26,155,181,0.12);
}
.form-control::placeholder { color: var(--c-text-light); }
textarea.form-control { resize: vertical; min-height: 80px; }

.form-select {
  width: 100%; padding: 9px 32px 9px 12px;
  background: var(--c-surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235A6B7E' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 12px center;
  color: var(--c-text); border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm); font-size: var(--fs-sm);
  cursor: pointer; appearance: none; -webkit-appearance: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none;
}
.form-select:focus {
  border-color: var(--c-accent-teal);
  box-shadow: 0 0 0 3px rgba(26,155,181,0.12);
}

.form-hint { font-size: var(--fs-xs); color: var(--c-text-muted); margin-top: var(--sp-1); }
.form-error { font-size: var(--fs-xs); color: var(--c-danger); margin-top: var(--sp-1); display: none; }
.form-group.has-error .form-control { border-color: var(--c-danger); }
.form-group.has-error .form-error { display: block; }

/* Radio & Checkbox groups */
.toggle-group {
  display: flex; gap: var(--sp-2); flex-wrap: wrap;
}
.toggle-btn {
  padding: 7px 14px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  font-size: var(--fs-xs); font-weight: var(--fw-medium);
  color: var(--c-text-muted); background: var(--c-surface);
  cursor: pointer; transition: all var(--t-fast);
  user-select: none;
}
.toggle-btn:hover { border-color: var(--c-accent-teal); color: var(--c-accent-teal); }
.toggle-btn.active {
  border-color: var(--c-accent-teal); color: var(--c-accent-teal);
  background: var(--c-accent-teal-lt); font-weight: var(--fw-semi);
}

/* Switch */
.switch-group { display: flex; align-items: center; gap: var(--sp-3); }
.switch {
  position: relative; display: inline-block;
  width: 40px; height: 22px; flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider {
  position: absolute; cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--c-border); border-radius: var(--r-full);
  transition: var(--t-fast);
}
.switch-slider:before {
  content: ''; position: absolute;
  height: 16px; width: 16px; left: 3px; bottom: 3px;
  background: white; border-radius: 50%;
  transition: var(--t-fast);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.switch input:checked + .switch-slider { background: var(--c-accent-teal); }
.switch input:checked + .switch-slider:before { transform: translateX(18px); }
.switch-label { font-size: var(--fs-sm); color: var(--c-text); }

/* Range Slider */
.range-group { display: flex; align-items: center; gap: var(--sp-3); }
.form-range {
  -webkit-appearance: none; appearance: none;
  flex: 1; height: 4px; background: var(--c-border);
  border-radius: var(--r-full); outline: none; cursor: pointer;
}
.form-range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--c-accent-teal);
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  cursor: pointer;
}
.range-value {
  min-width: 44px; text-align: right;
  font-size: var(--fs-sm); font-weight: var(--fw-semi);
  color: var(--c-accent-teal);
}

/* ── Badges ── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: var(--r-full);
  font-size: var(--fs-xs); font-weight: var(--fw-semi);
  white-space: nowrap;
}
.badge-primary { background: var(--c-primary-mid); color: white; }
.badge-teal { background: var(--c-accent-teal-lt); color: var(--c-primary-light); border: 1px solid rgba(26,155,181,0.3); }
.badge-gold { background: var(--c-gold-lt); color: #8B6A1F; border: 1px solid rgba(201,168,76,0.4); }
.badge-success { background: var(--c-success-bg); color: var(--c-success); border: 1px solid rgba(45,157,120,0.3); }
.badge-warning { background: var(--c-warning-bg); color: var(--c-warning); border: 1px solid rgba(217,119,6,0.3); }
.badge-danger { background: var(--c-danger-bg); color: var(--c-danger); border: 1px solid rgba(197,48,48,0.3); }
.badge-neutral { background: var(--c-bg); color: var(--c-text-muted); border: 1px solid var(--c-border); }

/* ── Progress Bar ── */
.progress-bar {
  height: 8px; background: var(--c-border);
  border-radius: var(--r-full); overflow: hidden;
}
.progress-fill {
  height: 100%; border-radius: var(--r-full);
  background: linear-gradient(90deg, var(--c-accent-teal), var(--c-primary-light));
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}
.progress-fill.success { background: linear-gradient(90deg, var(--c-success), #38C497); }
.progress-fill.warning { background: linear-gradient(90deg, var(--c-warning), #F59E0B); }
.progress-fill.danger  { background: linear-gradient(90deg, var(--c-danger), #E53E3E); }
.progress-fill.gold    { background: linear-gradient(90deg, var(--c-gold), #E2B75A); }
/* KPI fill bars — same colour scheme as progress-fill */
.kpi-fill.success { background: linear-gradient(90deg, var(--c-success), #38C497); }
.kpi-fill.warning { background: linear-gradient(90deg, var(--c-warning), #F59E0B); }
.kpi-fill.danger  { background: linear-gradient(90deg, var(--c-danger), #E53E3E); }

/* KPI Score Bar */
.kpi-item { margin-bottom: var(--sp-4); }
.kpi-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: var(--sp-2);
}
.kpi-label { font-size: var(--fs-sm); font-weight: var(--fw-medium); color: var(--c-text); }
.kpi-score { font-size: var(--fs-sm); font-weight: var(--fw-bold); }
.kpi-score.high        { color: var(--c-success); }
.kpi-score.medium      { color: var(--c-warning); }
.kpi-score.low         { color: var(--c-danger); }
/* analyze.html uses kpi-card-score instead of kpi-score */
.kpi-card-score.high   { color: var(--c-success); }
.kpi-card-score.medium { color: var(--c-warning); }
.kpi-card-score.low    { color: var(--c-danger); }
.kpi-score.info   { color: var(--c-accent-teal); }
.kpi-bar { height: 6px; background: var(--c-border); border-radius: var(--r-full); overflow: hidden; }
.kpi-fill {
  height: 100%; border-radius: var(--r-full);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}

/* ── Alerts ── */
.alert {
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-md);
  font-size: var(--fs-sm); line-height: 1.6;
  display: flex; gap: var(--sp-3);
  border-left: 3px solid;
}
.alert-icon { flex-shrink: 0; margin-top: 1px; font-size: 16px; }
.alert-info    { background: var(--c-info-bg);    color: var(--c-info);    border-color: var(--c-info);    }
.alert-success { background: var(--c-success-bg); color: var(--c-success); border-color: var(--c-success); }
.alert-warning { background: var(--c-warning-bg); color: var(--c-warning); border-color: var(--c-warning); }
.alert-danger  { background: var(--c-danger-bg);  color: var(--c-danger);  border-color: var(--c-danger);  }

/* ── Tables ── */
.table-wrap { overflow-x: auto; border-radius: var(--r-md); border: 1px solid var(--c-border-light); }
table { width: 100%; border-collapse: collapse; }
th {
  background: var(--c-surface-2); padding: 10px 14px;
  text-align: left; font-size: var(--fs-xs); font-weight: var(--fw-semi);
  color: var(--c-text-muted); letter-spacing: 0.5px; text-transform: uppercase;
  border-bottom: 1px solid var(--c-border-light);
  white-space: nowrap;
}
td {
  padding: 11px 14px; font-size: var(--fs-sm);
  border-bottom: 1px solid var(--c-border-light);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--c-surface-2); }

/* ── Tag / Pill ── */
.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: var(--r-full);
  font-size: var(--fs-xs); background: var(--c-bg);
  color: var(--c-text-muted); border: 1px solid var(--c-border);
}

/* ── Divider ── */
.divider {
  border: none; border-top: 1px solid var(--c-border-light);
  margin: var(--sp-5) 0;
}
.divider-text {
  display: flex; align-items: center; gap: var(--sp-3);
  margin: var(--sp-5) 0; color: var(--c-text-muted); font-size: var(--fs-xs);
}
.divider-text::before, .divider-text::after {
  content: ''; flex: 1; height: 1px; background: var(--c-border);
}

/* ── Toast Notifications ── */
.toast-container {
  position: fixed; top: calc(var(--nav-h) + 16px); right: 16px;
  z-index: 9000; display: flex; flex-direction: column; gap: var(--sp-2);
  pointer-events: none;
}
.toast {
  display: flex; align-items: flex-start; gap: var(--sp-3);
  padding: 12px 16px; border-radius: var(--r-md);
  background: var(--c-primary); color: white;
  box-shadow: var(--shadow-lg);
  font-size: var(--fs-sm); min-width: 280px; max-width: 380px;
  pointer-events: all;
  animation: toastIn 0.3s ease both;
  border-left: 3px solid var(--c-accent-teal);
}
.toast.success { border-color: var(--c-success); }
.toast.warning { border-color: var(--c-warning); background: #2A2010; }
.toast.error   { border-color: var(--c-danger);  background: #2A1010; }
.toast-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.toast-body { flex: 1; }
.toast-title { font-weight: var(--fw-semi); margin-bottom: 2px; }
.toast-msg { color: rgba(255,255,255,0.7); font-size: var(--fs-xs); }
.toast-close {
  background: none; border: none; color: rgba(255,255,255,0.4);
  cursor: pointer; font-size: 14px; padding: 0; flex-shrink: 0;
  transition: color var(--t-fast);
}
.toast-close:hover { color: white; }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(100%); }
}

/* ── Loading Spinner ── */
.spinner {
  display: inline-block; width: 20px; height: 20px;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.spinner-dark {
  border-color: rgba(15,43,61,0.2);
  border-top-color: var(--c-primary-mid);
}
.spinner-teal {
  border-color: rgba(26,155,181,0.2);
  border-top-color: var(--c-accent-teal);
}
.spinner-sm { width: 14px; height: 14px; border-width: 2px; }
.spinner-lg { width: 32px; height: 32px; border-width: 3px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Full-page loading overlay */
.loading-overlay {
  position: fixed; inset: 0; z-index: 9990;
  background: rgba(15,43,61,0.7); backdrop-filter: blur(4px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: var(--sp-4);
  opacity: 0; pointer-events: none; transition: opacity var(--t-base);
}
.loading-overlay.active { opacity: 1; pointer-events: all; }
.loading-text { color: white; font-size: var(--fs-md); font-weight: var(--fw-medium); }
.loading-sub { color: rgba(255,255,255,0.6); font-size: var(--fs-sm); }

/* ── Empty State ── */
.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--sp-16) var(--sp-6); text-align: center; gap: var(--sp-4);
}
.empty-icon {
  width: 72px; height: 72px; border-radius: var(--r-xl);
  background: var(--c-bg);
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; color: var(--c-text-light);
}
.empty-title { font-size: var(--fs-lg); font-weight: var(--fw-semi); color: var(--c-text); }
.empty-desc { font-size: var(--fs-sm); color: var(--c-text-muted); max-width: 320px; line-height: 1.7; }

/* ── Stat Cards ── */
.stat-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-radius: var(--r-lg);
  padding: var(--sp-5) var(--sp-6);
  box-shadow: var(--shadow-card);
}
.stat-label { font-size: var(--fs-xs); color: var(--c-text-muted); font-weight: var(--fw-medium); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: var(--sp-2); }
.stat-value { font-size: var(--fs-3xl); font-weight: var(--fw-bold); color: var(--c-primary); line-height: 1; margin-bottom: var(--sp-2); }
.stat-delta {
  font-size: var(--fs-xs); font-weight: var(--fw-medium);
  display: flex; align-items: center; gap: 3px;
}
.stat-delta.up { color: var(--c-success); }
.stat-delta.down { color: var(--c-danger); }

/* ── Section Headers ── */
.section-header { margin-bottom: var(--sp-6); }
.section-eyebrow {
  font-size: var(--fs-xs); font-weight: var(--fw-semi);
  color: var(--c-accent-teal); letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: var(--sp-2);
}
.section-title { font-size: var(--fs-2xl); font-weight: var(--fw-bold); color: var(--c-primary); }
.section-desc { font-size: var(--fs-base); color: var(--c-text-muted); margin-top: var(--sp-2); }

/* ── Strategy Cards ── */
.strategy-card {
  border: 2px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  cursor: pointer; transition: all var(--t-base);
  background: var(--c-surface);
}
.strategy-card:hover { border-color: var(--c-accent-teal); box-shadow: var(--shadow-md); }
.strategy-card.selected {
  border-color: var(--c-accent-teal);
  background: var(--c-accent-teal-lt);
}
.strategy-card.recommended {
  border-color: var(--c-gold);
  background: var(--c-gold-lt);
}

/* ── Info Tooltip ── */
.tooltip-wrap { position: relative; display: inline-flex; }
.tooltip-icon {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--c-border); color: var(--c-text-muted);
  font-size: 9px; font-weight: var(--fw-bold);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: help; flex-shrink: 0; margin-left: 4px;
}
.tooltip-text {
  position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%);
  background: var(--c-primary); color: white;
  font-size: var(--fs-xs); padding: 6px 10px; border-radius: var(--r-sm);
  width: max-content; max-width: 220px; line-height: 1.5;
  pointer-events: none; opacity: 0; transition: opacity var(--t-fast);
  white-space: normal; z-index: 100;
}
.tooltip-wrap:hover .tooltip-text { opacity: 1; }

/* ── Accordion ── */
.accordion-item { border-bottom: 1px solid var(--c-border-light); }
.accordion-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-4) var(--sp-5); cursor: pointer;
  font-size: var(--fs-sm); font-weight: var(--fw-semi); color: var(--c-text);
  transition: background var(--t-fast); user-select: none;
}
.accordion-header:hover { background: var(--c-surface-2); }
.accordion-arrow { transition: transform var(--t-base); font-size: 12px; color: var(--c-text-muted); }
.accordion-item.open .accordion-arrow { transform: rotate(180deg); }
.accordion-body { display: none; padding: 0 var(--sp-5) var(--sp-4); }
.accordion-item.open .accordion-body { display: block; }

/* ── Tabs ── */
.tab-nav {
  display: flex; gap: 2px; border-bottom: 1px solid var(--c-border-light);
  margin-bottom: var(--sp-5);
}
.tab-btn {
  padding: 10px 18px; font-size: var(--fs-sm); font-weight: var(--fw-medium);
  color: var(--c-text-muted); background: none; border: none;
  border-bottom: 2px solid transparent; cursor: pointer;
  transition: all var(--t-fast); margin-bottom: -1px;
}
.tab-btn:hover { color: var(--c-text); }
.tab-btn.active { color: var(--c-accent-teal); border-bottom-color: var(--c-accent-teal); font-weight: var(--fw-semi); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Utility Classes ── */
.flex { display: flex; } .flex-col { flex-direction: column; }
.items-center { align-items: center; } .items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; } .justify-center { justify-content: center; }
.gap-1 { gap: var(--sp-1); } .gap-2 { gap: var(--sp-2); } .gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); } .gap-5 { gap: var(--sp-5); } .gap-6 { gap: var(--sp-6); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.text-center { text-align: center; } .text-right { text-align: right; }
.text-muted { color: var(--c-text-muted); }
.text-light { color: var(--c-text-light); }
.text-success { color: var(--c-success); } .text-danger { color: var(--c-danger); }
.text-warning { color: var(--c-warning); } .text-teal { color: var(--c-accent-teal); }
.text-gold { color: var(--c-gold); }
.text-xs { font-size: var(--fs-xs); } .text-sm { font-size: var(--fs-sm); }
.text-md { font-size: var(--fs-md); } .text-lg { font-size: var(--fs-lg); }
.fw-medium { font-weight: var(--fw-medium); } .fw-semi { font-weight: var(--fw-semi); } .fw-bold { font-weight: var(--fw-bold); }
.mb-1 { margin-bottom: var(--sp-1); } .mb-2 { margin-bottom: var(--sp-2); }
.mb-3 { margin-bottom: var(--sp-3); } .mb-4 { margin-bottom: var(--sp-4); }
.mb-5 { margin-bottom: var(--sp-5); } .mb-6 { margin-bottom: var(--sp-6); }
.mt-1 { margin-top: var(--sp-1); } .mt-2 { margin-top: var(--sp-2); }
.mt-4 { margin-top: var(--sp-4); } .mt-6 { margin-top: var(--sp-6); }
.p-4 { padding: var(--sp-4); } .p-5 { padding: var(--sp-5); } .p-6 { padding: var(--sp-6); }
.rounded { border-radius: var(--r-md); } .rounded-sm { border-radius: var(--r-sm); } .rounded-lg { border-radius: var(--r-lg); }
.bg-surface { background: var(--c-surface); }
.bg-alt { background: var(--c-bg); }
.border { border: 1px solid var(--c-border); }
.border-light { border: 1px solid var(--c-border-light); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.hidden { display: none !important; }
.overflow-hidden { overflow: hidden; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.capitalize { text-transform: capitalize; }
.uppercase { text-transform: uppercase; letter-spacing: 0.5px; }

/* ── Animations ── */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.animate-fade { animation: fadeIn 0.3s ease both; }
.animate-up { animation: slideUp 0.4s ease both; }
.animate-down { animation: slideDown 0.3s ease both; }
.animate-scale { animation: scaleIn 0.3s ease both; }
.animate-pulse { animation: pulse 1.5s ease-in-out infinite; }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--c-border-light) 25%, var(--c-border) 50%, var(--c-border-light) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r-sm);
}
.skeleton-line { height: 14px; margin-bottom: 8px; }
.skeleton-line:last-child { width: 60%; }
.skeleton-title { height: 22px; margin-bottom: 12px; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --nav-h: 56px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .navbar-nav { display: none; }
  h1 { font-size: var(--fs-2xl); }
  h2 { font-size: var(--fs-xl); }
}
@media (max-width: 480px) {
  :root { --sp-6: 16px; }
  .btn-xl { padding: 13px 24px; font-size: var(--fs-md); }
  .hide-mobile { display: none !important; }
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: var(--c-text-light); }