/**
 * PicZFlip — Stitch Design System
 * Source of truth for all design tokens, typography, and shared components.
 * Import this on every page AFTER the Google Fonts link.
 *
 * Google Fonts (include in <head>):
 *   Plus Jakarta Sans: wght 400–800
 *   Inter: wght 400–600
 *   Material Symbols Outlined
 */

/* ─────────────────────────────────────────────── */
/* DESIGN TOKENS                                   */
/* ─────────────────────────────────────────────── */
:root {
  /* Primary green palette */
  --primary:                  #4f6353;
  --primary-dim:              #445748;
  --primary-light:            #6b8870;
  --primary-container:        #d2e8d4;
  --on-primary:               #ffffff;
  --on-primary-container:     #1a2e1c;

  /* Secondary */
  --secondary:                #7b5556;
  --secondary-container:      #f5d7d8;
  --on-secondary:             #ffffff;

  /* Surface / Background */
  --surface:                  #faf9f7;
  --surface-dim:              #f0ede8;
  --surface-container:        #edeeeb;
  --surface-container-low:    #f4f5f2;
  --surface-container-lowest: #ffffff;

  /* Text (on-surface) */
  --on-surface:               #2f3331;
  --on-surface-variant:       #5c605d;

  /* Outline */
  --outline:                  #777c79;
  --outline-variant:          #c2c7c3;

  /* Semantic */
  --success:                  #4f6353;
  --warning:                  #d4820a;
  --error:                    #b3261e;

  /* Shadows */
  --shadow-card:              0 8px 32px rgba(47,51,49,0.04);
  --shadow-float:             0 16px 48px rgba(47,51,49,0.08);
  --shadow-editorial:         0 8px 32px rgba(47,51,49,0.04);

  /* Border radii */
  --radius:                   1rem;       /* 16px default */
  --radius-sm:                0.75rem;    /* 12px */
  --radius-lg:                2rem;       /* 32px */
  --radius-full:              9999px;     /* pill */

  /* Nav */
  --nav-glass:                rgba(250,249,247,0.85);
  --nav-blur:                 blur(24px);
}

/* ─────────────────────────────────────────────── */
/* RESET & BASE                                    */
/* ─────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--surface);
  color: var(--on-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  margin: 0;
}

/* ─────────────────────────────────────────────── */
/* TYPOGRAPHY                                      */
/* ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: 0;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }

p, li, td, th {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  line-height: 1.6;
  color: var(--on-surface-variant);
}

label, .label, small, .caption, .tag, .badge {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 500;
}

/* ─────────────────────────────────────────────── */
/* MATERIAL SYMBOLS                                */
/* ─────────────────────────────────────────────── */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  line-height: 1;
  user-select: none;
}

/* Icon containers */
.icon-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: var(--primary-container);
  color: var(--primary);
}

.icon-container.icon-sm {
  width: 40px;
  height: 40px;
  font-size: 1.25rem;
}

.icon-container.icon-lg {
  width: 80px;
  height: 80px;
  font-size: 2rem;
}

/* ─────────────────────────────────────────────── */
/* BUTTONS                                         */
/* ─────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff !important;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  white-space: nowrap;
  line-height: 1.4;
}

.btn-primary:hover {
  background: var(--primary-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,99,83,0.25);
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--on-surface) !important;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1.5px solid var(--outline-variant);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  line-height: 1.4;
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: var(--primary-container);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--primary) !important;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* ─────────────────────────────────────────────── */
/* CARDS                                           */
/* ─────────────────────────────────────────────── */
.card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius);
  box-shadow: var(--shadow-editorial);
  padding: 1.5rem;
  border: 1px solid var(--outline-variant);
  transition: transform 0.3s cubic-bezier(.22,.68,0,1.2), box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(47,51,49,0.10);
}

.card-flat {
  background: var(--surface-container-lowest);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--outline-variant);
}

/* ─────────────────────────────────────────────── */
/* BOTTOM NAV (app pages)                          */
/* ─────────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  min-height: 72px;
  background: var(--surface-container-lowest);
  border-top: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 100;
  padding: 0 0.5rem;
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 16px);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.5rem 1rem;
  text-decoration: none;
  color: var(--on-surface-variant) !important;
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s;
  flex: 1;
  min-width: 0;
}

.bottom-nav-item .material-symbols-outlined {
  font-size: 1.4rem;
}

.bottom-nav-item:link, .bottom-nav-item:visited {
  color: var(--on-surface-variant) !important;
}

.bottom-nav-item.active {
  color: var(--primary) !important;
}

.bottom-nav-item.active:link, .bottom-nav-item.active:visited {
  color: var(--primary) !important;
}

.bottom-nav-item:hover {
  color: var(--primary) !important;
}

/* Scan FAB (center of bottom nav) */
.bottom-nav-fab {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(79,99,83,0.35);
  transition: all 0.2s;
  flex-shrink: 0;
  margin-bottom: 0.5rem;
}

.bottom-nav-fab:hover {
  background: var(--primary-dim);
  transform: scale(1.05);
}

.bottom-nav-fab .material-symbols-outlined {
  font-size: 1.5rem;
}

/* ─────────────────────────────────────────────── */
/* SECTION LABELS                                  */
/* ─────────────────────────────────────────────── */
.section-eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  display: block;
  margin-bottom: 0.5rem;
}

/* ─────────────────────────────────────────────── */
/* FLIP SCORE BADGE                                */
/* ─────────────────────────────────────────────── */
.flip-score-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--surface-container-lowest);
  border-radius: var(--radius-full);
  padding: 0.35rem 0.75rem;
  box-shadow: var(--shadow-card);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--on-surface);
}

.flip-score-high  { color: #2d7d46; }
.flip-score-mid   { color: #d4820a; }
.flip-score-low   { color: #b3261e; }

/* ─────────────────────────────────────────────── */
/* FORM ELEMENTS                                   */
/* ─────────────────────────────────────────────── */
input, textarea, select {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--surface-container-lowest);
  border: 1.5px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  color: var(--on-surface);
  padding: 0.75rem 1rem;
  width: 100%;
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,99,83,0.15);
}

input::placeholder, textarea::placeholder {
  color: var(--outline);
}

/* ─────────────────────────────────────────────── */
/* UTILITY                                         */
/* ─────────────────────────────────────────────── */
.text-primary     { color: var(--primary) !important; }
.text-muted       { color: var(--on-surface-variant) !important; }
.bg-surface       { background: var(--surface) !important; }
.bg-primary       { background: var(--primary) !important; }
.bg-container     { background: var(--primary-container) !important; }

/* ─────────────────────────────────────────────── */
/* LEGACY OVERRIDES (migrate old pages to Stitch)  */
/* ─────────────────────────────────────────────── */

/* Replace old cream/olive palette globally */
:root {
  --bg-primary:   var(--surface)          !important;
  --bg-secondary: var(--surface-container) !important;
  --bg-elevated:  var(--surface-container-lowest) !important;
  --accent:       var(--primary)          !important;
  --accent-hover: var(--primary-dim)      !important;
  --text-primary: var(--on-surface)       !important;
  --text-secondary: var(--on-surface-variant) !important;
  --border:       var(--outline-variant)  !important;
}
