/* ============================================================
   MAIN STYLES — cozy pastel design system
   Shared tokens + components used across every page.
   Palette: soft light-blue + periwinkle-lavender + peach,
   rounded corners, gentle layered shadows, warm friendly text.
   ============================================================ */

:root {
  /* ---- ink / text ---- */
  --ink:        #2c2942;   /* soft near-black plum-navy, cozier than pure black */
  --ink-soft:   #595571;   /* body-secondary */
  --ink-faint:  #8b87a3;   /* captions, meta */

  /* ---- surfaces ---- */
  --paper:      #f4f6fd;   /* page background, faint light-blue wash */
  --paper-warm: #fbf6f2;   /* warm alt background for cozy sections */
  --surface:    #ffffff;   /* cards */
  --surface-2:  #eef2fc;   /* soft blue fill / muted */
  --surface-3:  #e7ecfa;

  /* ---- accents (a gentle mix) ---- */
  --blue:       #7bace8;   /* light sky blue — the lead accent */
  --blue-600:   #4f8bd4;
  --blue-tint:  #e4eefb;
  --lav:        #b7c1f1;   /* periwinkle lavender */
  --lav-600:    #6f7fe0;
  --lav-tint:   #ebeefb;
  --peach:      #f6c6a8;   /* warm peach */
  --peach-600:  #e79a6d;
  --peach-tint: #fde7d8;
  --mint:       #a6e2c8;
  --mint-600:   #4cbd90;
  --mint-tint:  #e2f6ee;
  --butter:     #f7e2a6;
  --butter-tint:#fbf1cf;

  /* ---- brand / interactive ---- */
  --accent:      #6f8fe6;  /* periwinkle-blue: links, emphasis, focus */
  --accent-600:  #5474d4;
  --accent-soft: #c8d5f6;  /* borders, chips */
  --accent-tint: #e9eefc;  /* subtle backgrounds */

  /* ---- semantic ---- */
  --good:       #4fc196;
  --good-tint:  #dff5ec;
  --warn:       #f0b24d;
  --warn-tint:  #fbeecf;
  --bad:        #ef7d6a;
  --bad-tint:   #fbe4df;

  /* ---- borders ---- */
  --line:       #e4e8f4;   /* hairline */
  --line-soft:  #eef1f9;

  /* ---- radii ---- */
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-pill: 999px;

  /* ---- soft layered shadows ---- */
  --sh-xs: 0 1px 3px rgba(58,66,120,.05);
  --sh-sm: 0 3px 10px rgba(58,66,120,.06);
  --sh-md: 0 10px 26px rgba(58,66,120,.08);
  --sh-lg: 0 20px 50px rgba(58,66,120,.12);
  --sh-pop: 0 12px 30px rgba(111,143,230,.22);   /* accent glow */

  /* ---- spacing scale (4pt) ---- */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;

  --ease: cubic-bezier(.4, 0, .2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'Schibsted Grotesk', sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  font-weight: 450;
  letter-spacing: -0.005em;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

::selection { background: var(--accent-soft); color: var(--ink); }

/* ---------------- NAV ---------------- */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-5);
  height: 66px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-logo {
  font-family: 'Schibsted Grotesk', sans-serif;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.main { padding: var(--sp-6); }

/* ---------------- FORMS ---------------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--sp-5);
}

.form-group label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-soft);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-tint);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--ink-faint); }

/* ---------------- BUTTONS ---------------- */
.btn-primary {
  width: 100%;
  padding: 15px 20px;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg, var(--accent) 0%, var(--lav-600) 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  box-shadow: var(--sh-pop);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), filter .18s var(--ease);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(111,143,230,.30); }
.btn-primary:active { transform: translateY(0); }

/* ---------------- ALERTS ---------------- */
.alert {
  padding: 13px 16px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--sp-4);
  border: 1.5px solid transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert-error   { background: var(--bad-tint);  color: #b3402c; border-color: #f4c4bb; }
.alert-success { background: var(--good-tint); color: #1f7a5a; border-color: #bfe9d7; }

/* ---------------- AUTH ---------------- */
.auth-wrap {
  min-height: calc(100vh - 66px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background:
    radial-gradient(60% 60% at 15% 10%, var(--blue-tint) 0%, transparent 60%),
    radial-gradient(60% 60% at 90% 90%, var(--peach-tint) 0%, transparent 55%),
    var(--paper);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 40px 36px;
  box-shadow: var(--sh-lg);
}

.auth-card h1 {
  font-family: 'Schibsted Grotesk', sans-serif;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.1;
}

.auth-sub { font-size: 15px; font-weight: 500; color: var(--ink-soft); margin-bottom: 26px; }
.auth-switch { text-align: center; font-size: 14px; font-weight: 500; color: var(--ink-soft); }
.auth-switch a { color: var(--accent-600); font-weight: 700; }
.auth-card .auth-switch { margin-top: 22px; }

/* ---------------- PANELS / CARDS ---------------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  box-shadow: var(--sh-md);
}

.panel-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Schibsted Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.panel-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-600);
}

.panel-note { font-size: 13.5px; color: var(--ink-soft); margin: 12px 0; }

/* ---------------- LOG BUTTONS (soft tiles) ---------------- */
.log-btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 10px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  transition: background .16s var(--ease), border-color .16s var(--ease), transform .16s var(--ease);
}

.log-btn:hover { background: var(--accent-tint); border-color: var(--accent-soft); transform: translateY(-1px); }
.log-btn.locked { opacity: 0.5; cursor: default; }
.log-btn.locked:hover { background: var(--surface); transform: none; border-color: var(--line); }

/* ---------------- CHART BARS ---------------- */
.chart-bars { display: flex; align-items: flex-end; gap: 6px; }

.bar {
  flex: 1;
  min-height: 10px;
  background: var(--surface-2);
  border-radius: 10px 10px 4px 4px;
  transition: background .18s var(--ease), transform .18s var(--ease);
}

.bar:hover { transform: scaleY(1.02); }
.bar:hover,
.bar.active { background: linear-gradient(180deg, var(--blue) 0%, var(--lav) 100%); }

/* ---------------- STREAK DOTS ---------------- */
.s-day { width: 20px; height: 20px; border-radius: 7px; background: var(--surface-2); }
.s-day.done { background: linear-gradient(135deg, var(--blue) 0%, var(--lav-600) 100%); }
.s-day.today { background: var(--surface); box-shadow: inset 0 0 0 2.5px var(--accent); }

/* ---------------- HORIZONTAL RAIL ----------------
   Horizontal scroll-snap on tablet/desktop; stacks vertically
   on phones (per request). Wrap in .rail-wrap to get arrow buttons
   injected by rail.js. Use .h-rail--chips to keep horizontal on phone. */
.rail-wrap { position: relative; }

.h-rail {
  display: flex;
  gap: var(--sp-4);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 4px 2px 12px;
  scroll-padding-left: 2px;
}
.h-rail::-webkit-scrollbar { display: none; }

.h-rail > * {
  scroll-snap-align: start;
  flex: 0 0 clamp(260px, 78vw, 360px);
}

@media (min-width: 768px) {
  .h-rail > * { flex-basis: clamp(300px, 40%, 420px); }
}

/* phones: stack vertically instead of sideways scroll */
@media (max-width: 640px) {
  .h-rail:not(.h-rail--chips) {
    flex-direction: column;
    overflow-x: visible;
    scroll-snap-type: none;
  }
  .h-rail:not(.h-rail--chips) > * { flex-basis: auto; width: 100%; }
}

/* arrow buttons (added by rail.js) */
.rail-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  box-shadow: var(--sh-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  z-index: 5;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.rail-arrow:hover { color: var(--accent-600); transform: translateY(-50%) scale(1.06); }
.rail-arrow[disabled] { opacity: 0; pointer-events: none; }
.rail-arrow svg { width: 20px; height: 20px; }
.rail-arrow--prev { left: -8px; }
.rail-arrow--next { right: -8px; }
@media (max-width: 640px) { .rail-arrow { display: none; } }

/* rail dots */
.rail-dots { display: flex; gap: 6px; justify-content: center; margin-top: 6px; }
.rail-dot { width: 7px; height: 7px; border-radius: var(--r-pill); background: var(--accent-soft); transition: width .2s var(--ease), background .2s var(--ease); }
.rail-dot.active { width: 22px; background: var(--accent); }
@media (max-width: 640px) { .rail-dots { display: none; } }

/* ---------------- SESSION ROWS ---------------- */
.session-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.session-row:last-child { border-bottom: none; }
.session-row-main { flex: 1; font-weight: 600; color: var(--ink); }
.session-row-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--surface-2);
  padding: 3px 10px;
  border-radius: var(--r-pill);
}
.session-row-time { font-size: 13px; font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; }
.session-row-link { transition: background .15s var(--ease); border-radius: 10px; }
.session-row-link:hover { background: var(--accent-tint); }

/* ---------------- UTILITIES ---------------- */
.text-center { text-align: center; }
.hidden { display: none !important; }
.no-underline { text-decoration: none; }
.mt-8 { margin-top: 8px; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

@media (max-width: 768px) {
  nav { padding: 0 var(--sp-4); }
  .main { padding: var(--sp-4); }
}