/* ============================================================
   VARIABLES
============================================================ */
:root {
  --bg-page:          #f0f4f8;
  --bg-card:          #ffffff;
  --sidebar-bg:       #0f172a;
  --sidebar-border:   #1e293b;
  --sidebar-hover:    #1e293b;
  --accent-blue:      #3b82f6;
  --accent-blue-dark: #2563eb;
  --accent-green:     #10b981;
  --accent-green-dark:#059669;
  --text-primary:     #0f172a;
  --text-secondary:   #475569;
  --text-muted:       #94a3b8;
  --text-on-dark:     #f1f5f9;
  --text-on-dark-dim: #94a3b8;
  --border:           #e2e8f0;
  --white:            #ffffff;
  --radius:           10px;
  --radius-sm:        6px;
  --radius-pill:      999px;
  --sidebar-width:    230px;
  --topbar-height:    56px;
  --shadow:           0 2px 12px rgba(0,0,0,0.09);
  --shadow-md:        0 4px 24px rgba(0,0,0,0.13);
  --transition:       all 0.18s ease;
}

/* ============================================================
   RESET & BASE
============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  display: block;
  height: 100vh;
  overflow: hidden;
  font-family: 'Lato', system-ui, sans-serif;
  color: var(--text-primary);
  background: var(--bg-page);
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }
img { display: block; max-width: 100%; }

/* ============================================================
   MOBILE TOPBAR
============================================================ */
#topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-height);
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--sidebar-border);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0 1rem;
  /* sits below sidebar (z:300) but above content */
  z-index: 200;
  /* extend into iPhone notch area */
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
}

.topbar-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-on-dark);
}

.topbar-heart { color: var(--accent-green); }

.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  padding: 6px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: var(--transition);
  /* large enough touch target */
  -webkit-tap-highlight-color: transparent;
}

.hamburger-btn:hover,
.hamburger-btn:active { background: var(--sidebar-hover); }

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-on-dark);
  border-radius: 2px;
}

/* ============================================================
   SIDEBAR OVERLAY (mobile backdrop)
============================================================ */
#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 299;
  cursor: pointer;
}

body.sidebar-open #sidebar-overlay { display: block; }

/* ============================================================
   SIDEBAR
============================================================ */
#sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  z-index: 300;
}

body.sidebar-open #sidebar { transform: translateX(0); }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 1.5rem 1.2rem 1.3rem;
  border-bottom: 1px solid var(--sidebar-border);
}

.brand-heart { font-size: 1.3rem; color: var(--accent-green); }

.brand-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-on-dark);
  white-space: nowrap;
}

#sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 0.65rem;
  gap: 0.15rem;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-on-dark-dim);
  font-size: 1rem;
  font-weight: 400;
  white-space: nowrap;
  overflow: hidden;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
  /* large touch target */
  min-height: 44px;
}

.nav-link:hover,
.nav-link:active { background: var(--sidebar-hover); color: var(--text-on-dark); }

.nav-link.active { background: var(--accent-blue); color: var(--white); font-weight: 700; }
.nav-link.active:hover { background: var(--accent-blue-dark); }

.nav-icon { font-size: 1rem; flex-shrink: 0; }
.nav-label { overflow: hidden; text-overflow: ellipsis; }

.nav-divider {
  height: 1px;
  background: var(--sidebar-border);
  margin: 0.5rem 0.4rem;
}

.sidebar-footer {
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--sidebar-border);
}

.sidebar-footer-text {
  font-family: 'Dancing Script', cursive;
  font-size: 0.95rem;
  color: var(--text-on-dark-dim);
}

/* ============================================================
   MAIN CONTENT
============================================================ */
#content {
  width: 100%;
  height: 100vh;
  overflow-y: auto;
  /* push content below fixed topbar; extra 1rem breathing room */
  padding: calc(var(--topbar-height) + 1.25rem) 1rem 2rem;
  background: var(--bg-page);
  /* smooth momentum scroll on iOS */
  -webkit-overflow-scrolling: touch;
}

/* ============================================================
   SECTION LAYOUT
============================================================ */
.section-header { margin-bottom: 1.5rem; }

.section-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.section-subtitle { font-size: 0.9rem; color: var(--text-secondary); }

/* All grids default to 1 column on mobile */
.section-grid,
.couple-stats-grid,
.dates-key-row,
.data-section-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.couple-stats-grid { grid-template-columns: 1fr 1fr; }

/* ============================================================
   CARD
============================================================ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1.2rem 1.25rem;
  margin-bottom: 1rem;
}

.card-title {
  font-family: 'Playfair Display', serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

/* ============================================================
   COUPLE HERO
============================================================ */
.couple-hero {
  background: linear-gradient(135deg, var(--accent-blue-dark) 0%, #1d4ed8 50%, var(--accent-green-dark) 100%);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 2rem 1.25rem;
  text-align: center;
  color: var(--white);
  margin-bottom: 1rem;
}

.couple-hero-names {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.couple-hero-heart { font-size: 1.3rem; margin: 0 0.5rem; opacity: 0.85; }
.couple-hero-tagline { font-size: 0.9rem; opacity: 0.75; font-weight: 300; }

.countdown-card { text-align: center; }

.countdown-number {
  font-family: 'Playfair Display', serif;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-blue);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.countdown-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

/* ============================================================
   PERSON PROFILE HEADER
============================================================ */
.person-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.photo-circle-wrapper { position: relative; flex-shrink: 0; cursor: pointer; }

.photo-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-blue);
  display: block;
}

.photo-circle-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px dashed var(--border);
  background: var(--bg-page);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  padding: 0.5rem;
}

.photo-circle-placeholder:active { border-color: var(--accent-blue); color: var(--accent-blue); }

.photo-upload-hint {
  position: absolute;
  bottom: 0; right: 0;
  background: var(--accent-blue);
  color: var(--white);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  border: 2px solid var(--white);
  pointer-events: none;
}

.person-header-info { flex: 1; min-width: 0; }
.person-header-info .field-row { margin-bottom: 0.5rem; }
.person-header-info .field-row:last-child { margin-bottom: 0; }

/* ============================================================
   EDITABLE FIELDS
============================================================ */
.field-row { display: flex; align-items: baseline; gap: 0.5rem; }

.field-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  white-space: nowrap;
  flex-shrink: 0;
}

.editable {
  display: inline-block;
  min-width: 80px;
  max-width: 100%;
  border: none;
  border-bottom: 1.5px solid var(--border);
  outline: none;
  background: transparent;
  font-size: 0.95rem;
  color: var(--text-primary);
  padding: 0.1rem 0.2rem 0.15rem;
  transition: var(--transition);
}

.editable:focus { border-bottom-color: var(--accent-blue); background: #eff6ff; }
.editable.large { font-family: 'Playfair Display', serif; font-size: 1.25rem; font-weight: 600; }

.date-input {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.65rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-card);
  outline: none;
  transition: var(--transition);
  /* Make date pickers easier to tap on mobile */
  min-height: 40px;
}

.date-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }

/* ============================================================
   TAGS / CHIPS
============================================================ */
.tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #ecfdf5;
  color: var(--accent-green-dark);
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.75rem 0.3rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
}

.tag.dislike { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }
.tag.hobby   { background: #eff6ff; color: var(--accent-blue-dark); border-color: #bfdbfe; }

.tag-delete-btn {
  background: none;
  border: none;
  padding: 0.1rem 0.2rem;
  font-size: 0.85rem;
  cursor: pointer;
  color: inherit;
  opacity: 0.55;
  line-height: 1;
  transition: var(--transition);
  /* minimum tap area */
  min-width: 24px;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tag-delete-btn:active { opacity: 1; }

.add-tag-row { display: flex; align-items: center; gap: 0.4rem; margin-top: 0.75rem; }

.add-tag-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.7rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-page);
  outline: none;
  transition: var(--transition);
  /* comfortable tap height */
  min-height: 40px;
}

.add-tag-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(59,130,246,0.12); background: var(--white); }
.add-tag-input::placeholder { color: var(--text-muted); }

/* ============================================================
   BUTTONS
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  /* tap target */
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
}

.btn-primary  { background: var(--accent-blue); color: var(--white); border-color: var(--accent-blue); }
.btn-primary:active { background: var(--accent-blue-dark); }

.btn-secondary { background: transparent; color: var(--accent-blue); border-color: var(--accent-blue); }
.btn-secondary:active { background: var(--accent-blue); color: var(--white); }

.btn-icon {
  padding: 0.5rem 0.65rem;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  min-width: 40px;
  justify-content: center;
}

.btn-icon:active { border-color: #fecaca; color: #b91c1c; background: #fef2f2; }
.btn-icon.btn-add { border-color: var(--accent-blue); color: var(--accent-blue); }
.btn-icon.btn-add:active { background: var(--accent-blue); color: var(--white); }

/* ============================================================
   DATES & MILESTONES
============================================================ */
.date-field-block { display: flex; flex-direction: column; gap: 0.4rem; }

.date-field-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.milestone-list { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 0.85rem; }

.milestone-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.6rem 0.75rem;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.milestone-date-input {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.5rem;
  font-size: 0.82rem;
  color: var(--text-primary);
  background: var(--white);
  outline: none;
  min-height: 38px;
}

.milestone-date-input:focus { border-color: var(--accent-blue); }

.milestone-label-input {
  border: none;
  border-bottom: 1.5px solid var(--border);
  background: transparent;
  outline: none;
  font-size: 0.9rem;
  color: var(--text-primary);
  padding: 0.2rem 0.3rem;
  width: 100%;
  min-height: 38px;
}

.milestone-label-input:focus { border-bottom-color: var(--accent-blue); }
.milestone-label-input::placeholder { color: var(--text-muted); }
.milestones-empty { text-align: center; color: var(--text-muted); font-size: 0.9rem; padding: 1rem 0 0.5rem; }

/* ============================================================
   LOVE NOTES
============================================================ */
.notes-textarea {
  width: 100%;
  min-height: 240px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-card);
  resize: vertical;
  outline: none;
  transition: var(--transition);
}

.notes-textarea:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(59,130,246,0.12); }
.notes-textarea::placeholder { color: var(--text-muted); font-style: italic; }

/* ============================================================
   SAVE & LOAD
============================================================ */
.data-card-title {
  font-family: 'Playfair Display', serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.data-card-desc { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 1rem; }

.local-save-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--accent-green-dark);
  font-weight: 700;
}

.local-save-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-green); flex-shrink: 0; }

/* ============================================================
   TOAST
============================================================ */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1rem;
  left: 1rem;
  background: var(--text-primary);
  color: var(--white);
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  text-align: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
  z-index: 500;
}

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

/* ============================================================
   UTILITIES
============================================================ */
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.text-muted { color: var(--text-muted); font-size: 0.88rem; }
.empty-state { text-align: center; color: var(--text-muted); font-size: 0.88rem; padding: 0.5rem 0; font-style: italic; }

/* ============================================================
   DESKTOP (768px+) — sidebar always visible, topbar hidden
============================================================ */
@media (min-width: 768px) {
  body { display: flex; flex-direction: row; }

  #topbar { display: none; }

  #sidebar {
    position: relative;
    transform: none !important;
    transition: none;
    z-index: auto;
    flex-shrink: 0;
  }

  #sidebar-overlay { display: none !important; }

  #content {
    padding: 2rem;
    height: 100vh;
  }

  .section-title { font-size: 1.8rem; }
  .couple-hero-names { font-size: 2rem; }
  .countdown-number { font-size: 3rem; }

  .section-grid      { grid-template-columns: 1fr 1fr; }
  .couple-stats-grid { grid-template-columns: repeat(3, 1fr); }
  .dates-key-row     { grid-template-columns: 1fr 1fr; }
  .data-section-grid { grid-template-columns: 1fr 1fr; }

  .btn-primary:hover  { background: var(--accent-blue-dark); }
  .btn-secondary:hover { background: var(--accent-blue); color: var(--white); }
  .btn-icon:hover { border-color: #fecaca; color: #b91c1c; background: #fef2f2; }
  .btn-icon.btn-add:hover { background: var(--accent-blue); color: var(--white); }

  .photo-circle-placeholder:hover { border-color: var(--accent-blue); color: var(--accent-blue); }

  .toast { left: auto; right: 1.5rem; width: auto; text-align: left; }
}