/*
 * Klarlist Design System
 * ======================
 * This file is the single source of truth for all visual design tokens.
 *
 * HOW TO CUSTOMIZE:
 *   - Edit the :root block below to adjust colors, fonts, and radii globally.
 *   - Token names follow Material Design 3 conventions: semantic, not visual.
 *     e.g. --color-on-surface-variant = "secondary text on a surface background"
 *   - No build step required — just edit and reload.
 */

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

:root {
  /* --- Fonts --- */
  --font-headline: "Noto Serif", serif;
  --font-body: "Plus Jakarta Sans", sans-serif;
  --font-label: "Plus Jakarta Sans", sans-serif;

  /* --- Border radius --- */
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* --- Colors: Surface --- */
  --color-background:                #fdf9f3;
  --color-surface:                   #fdf9f3;
  --color-surface-bright:            #fdf9f3;
  --color-surface-dim:               #dddad4;
  --color-surface-container-lowest:  #ffffff;
  --color-surface-container-low:     #f7f3ed;
  --color-surface-container:         #f1ede7;
  --color-surface-container-high:    #ebe8e2;
  --color-surface-container-highest: #e6e2dc;
  --color-surface-variant:           #e6e2dc;
  --color-inverse-surface:           #31302d;
  --color-inverse-on-surface:        #f4f0ea;

  /* --- Colors: Primary (warm red) --- */
  --color-primary:                   #9d3c37;
  --color-primary-container:         #bc544d;
  --color-primary-fixed:             #ffdad6;
  --color-primary-fixed-dim:         #ffb3ac;
  --color-inverse-primary:           #ffb3ac;
  --color-surface-tint:              #a03f39;
  --color-on-primary:                #ffffff;
  --color-on-primary-container:      #fffbff;
  --color-on-primary-fixed:          #410003;
  --color-on-primary-fixed-variant:  #802824;

  /* --- Colors: Secondary (muted green) --- */
  --color-secondary:                     #47664b;
  --color-secondary-container:           #c6e9c7;
  --color-secondary-fixed:               #c8ebca;
  --color-secondary-fixed-dim:           #adcfaf;
  --color-on-secondary:                  #ffffff;
  --color-on-secondary-container:        #4b6a4f;
  --color-on-secondary-fixed:            #03210c;
  --color-on-secondary-fixed-variant:    #304d35;

  /* --- Colors: Tertiary (teal/green) --- */
  --color-tertiary:                      #00694b;
  --color-tertiary-container:            #008560;
  --color-tertiary-fixed:                #82f8c8;
  --color-tertiary-fixed-dim:            #64dcad;
  --color-on-tertiary:                   #ffffff;
  --color-on-tertiary-container:         #f5fff7;
  --color-on-tertiary-fixed:             #002115;
  --color-on-tertiary-fixed-variant:     #005139;

  /* --- Colors: Error --- */
  --color-error:                #ba1a1a;
  --color-error-container:      #ffdad6;
  --color-on-error:             #ffffff;
  --color-on-error-container:   #93000a;

  /* --- Colors: Text & outline --- */
  --color-on-background:        #1c1c18;
  --color-on-surface:           #1c1c18;
  --color-on-surface-variant:   #564240;
  --color-outline:              #89726f;
  --color-outline-variant:      #dcc0bd;
}


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

body {
  font-family: var(--font-body);
  background-color: var(--color-background);
  color: var(--color-on-surface);
  min-height: 100dvh;
}

/* Material Symbols icon font settings */
.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  vertical-align: middle;
  font-size: 1.25rem;
  line-height: 1;
  user-select: none;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */

.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background-color: color-mix(in oklab, var(--color-surface) 80%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-outline-variant);
}

.top-nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.875rem 1.5rem;
  max-width: 64rem;
  margin: 0 auto;
}

.top-nav__brand {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.top-nav__brand:hover {
  text-decoration: none;
}

.top-nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.top-nav__link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.top-nav__link:hover {
  background-color: var(--color-surface-container);
  color: var(--color-on-surface);
  text-decoration: none;
}
.top-nav__link--active {
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
}

/* button_to generates a <form> wrapper — make it invisible for layout */
.top-nav__links form {
  display: contents;
}
/* button_to button inside nav inherits link styling */
.top-nav__links form .top-nav__link {
  appearance: none;
  font-size: 0.875rem;
  font-family: var(--font-body);
}

/* button_to inside checklist-item__toggle: hide the form wrapper */
.checklist-item__toggle form {
  display: contents;
}
.checklist-item__toggle button {
  all: unset;
  cursor: pointer;
  display: flex;
  align-items: center;
  line-height: 1;
  transition: opacity 0.15s ease;
}
.checklist-item__toggle button:hover {
  opacity: 0.7;
}

/* btn-icon forms (delete, etc.) in action groups */
.checklist-item__actions form,
.card__actions form {
  display: contents;
}

.page-canvas {
  max-width: 42rem;
  margin: 0 auto;
  padding: 6rem 1.5rem 3rem;
}

/* Wide layout variant for template/checklist index pages */
.page-canvas--wide {
  max-width: 56rem;
}

/* Narrow centered layout variant for auth pages */
.page-canvas--narrow {
  max-width: 28rem;
}

/* Centered page header (used on auth pages) */
.page-header--centered {
  text-align: center;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1,
.page-header h2 {
  font-family: var(--font-headline);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-on-surface);
  line-height: 1.15;
  margin: 0 0 0.375rem;
}

.page-header p {
  color: var(--color-on-surface-variant);
  font-size: 1rem;
  margin: 0;
}


/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* --- Card --- */
.card {
  background-color: var(--color-surface-container-low);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  background-color: var(--color-surface-container-high);
  box-shadow: 0 8px 32px rgba(86, 66, 64, 0.07);
}

/* Card variant for forms — no hover effect */
.card--flat {
  background-color: var(--color-surface-container-low);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
}

/* Card header row: title + actions */
.card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.card__title {
  font-family: var(--font-headline);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.card__meta {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.375rem;
}

.card__actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-shrink: 0;
}

/* --- Checklist --- */
.checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  color: var(--color-on-surface);
  font-size: 1rem;
  line-height: 1.4;
}

.checklist-item--completed {
  color: var(--color-on-surface-variant);
  text-decoration: line-through;
  text-decoration-color: var(--color-outline-variant);
}

.checklist-item__toggle {
  flex-shrink: 0;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  font-size: 1.25rem;
  line-height: 1;
  transition: opacity 0.15s ease;
}
.checklist-item__toggle:hover {
  opacity: 0.75;
}

.checklist-item__text {
  flex: 1;
}

.checklist-item__notes {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
}

.checklist-item__actions {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.checklist-item:hover .checklist-item__actions {
  opacity: 1;
}

/* --- Section label (used for section headings within lists) --- */
.section-label {
  font-family: var(--font-label);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-on-surface-variant);
  padding: 1rem 0 0.375rem;
  margin: 0;
}

/* First section-label in a list needs less top padding */
.checklist + .section-label,
:first-child > .section-label {
  padding-top: 0;
}

/* --- Progress bar --- */
.progress-bar {
  background-color: var(--color-surface-container-high);
  border-radius: var(--radius-full);
  height: 0.5rem;
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background-color: var(--color-secondary);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* --- Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: var(--radius-lg);
  padding: 0.5rem 1.125rem;
  font-family: var(--font-label);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.1s ease;
}
.btn-primary:hover {
  background-color: var(--color-primary-container);
  text-decoration: none;
  color: var(--color-on-primary);
}
.btn-primary:active {
  transform: scale(0.97);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: none;
  border: none;
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.875rem;
  font-family: var(--font-label);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease;
}
.btn-ghost:hover {
  background-color: var(--color-surface-container);
  text-decoration: none;
  color: var(--color-primary);
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: none;
  border: none;
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.875rem;
  font-family: var(--font-label);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-error);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease;
}
.btn-danger:hover {
  background-color: var(--color-error-container);
  text-decoration: none;
  color: var(--color-error);
}

/* Icon-only button (used for small actions like edit/delete inline) */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.25rem;
  color: var(--color-on-surface-variant);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
  line-height: 1;
}
.btn-icon:hover {
  background-color: var(--color-surface-container-high);
  color: var(--color-on-surface);
  text-decoration: none;
}
.btn-icon--danger:hover {
  background-color: var(--color-error-container);
  color: var(--color-error);
}

/* --- Form fields --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 1.125rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-on-surface-variant);
  font-family: var(--font-label);
}

.form-field {
  background-color: var(--color-surface-container-lowest);
  border: 1.5px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: 0.625rem 0.875rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-on-surface);
  width: 100%;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 15%, transparent);
}
.form-field::placeholder {
  color: var(--color-outline);
}

/* --- Flash messages --- */
.flash-messages {
  max-width: 42rem;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 0;
}

.flash {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  border: 1px solid;
}

.flash[data-flash-type="notice"],
.flash[data-flash-type="success"] {
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  border-color: color-mix(in oklab, var(--color-secondary-container) 60%, var(--color-outline-variant));
}

.flash[data-flash-type="alert"],
.flash[data-flash-type="error"] {
  background-color: var(--color-error-container);
  color: var(--color-on-error-container);
  border-color: color-mix(in oklab, var(--color-error-container) 60%, var(--color-outline-variant));
}

/* --- Empty state --- */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--color-on-surface-variant);
}

.empty-state p {
  margin-bottom: 1rem;
  font-size: 1rem;
}