/* =============================================================================
   base.css — komochan.jp
   Life adventurer / speaker / human development consultant — KOMO / 爰野寿美子
   ============================================================================= */

/* =============================================================================
   1. CSS CUSTOM PROPERTIES
   ============================================================================= */

:root {
  /* --- Color: Primaries (Yellow Brand System) --- */
  --color-yellow:       #F5C300;   /* brand yellow — hero bg */
  --color-yellow-pale:  #FDF4C0;   /* pale yellow — section bg */
  --color-yellow-mid:   #FAE882;   /* medium yellow — alternate section */
  --color-yellow-light: #FFFAE8;   /* near-white yellow — card bg */
  --color-forest:       #3A2800;   /* dark amber — replaces forest green */
  --color-forest-dark:  #2A2000;   /* darkest amber — footer / hero dark */
  --color-forest-mid:   #5C4200;   /* mid amber — hover states */
  --color-cream:        #FDF4C0;   /* pale yellow — "cream" equivalent */
  --color-near-white:   #FFFAE8;   /* near-white yellow */

  /* --- Color: Accents --- */
  --color-terracotta:   #C8553D;   /* terracotta / rust — CTA */
  --color-terra-dark:   #A8432D;   /* terracotta hover */
  --color-gold:         #C8A000;   /* warm gold on pale yellow */
  --color-gold-light:   #D4B840;   /* lighter gold */

  /* --- Color: Text --- */
  --color-text:         #2A2000;   /* dark amber — primary text */
  --color-text-soft:    #5A4500;   /* medium amber — secondary text */
  --color-text-muted:   #8A7000;   /* muted amber */

  /* --- Color: Surfaces --- */
  --color-surface:      #FFFAE8;
  --color-card-bg:      #FDF4C0;
  --color-border:       #E8D460;   /* yellow-tinted border */
  --color-border-light: #F0E880;

  /* --- Color: Backgrounds --- */
  --color-bg:           #FDF4C0;
  --color-bg-alt:       #FFFAE8;

  /* --- Typography: Font Families --- */
  --font-jp-serif:      'Shippori Mincho B1', 'Noto Serif JP', 'Yu Mincho', serif;
  --font-en-serif:      'Cormorant Garamond', 'Garamond', Georgia, serif;
  --font-sans:          'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;

  /* --- Typography: Scale --- */
  --text-xs:   0.75rem;    /*  12px */
  --text-sm:   0.875rem;   /*  14px */
  --text-base: 1rem;       /*  16px */
  --text-md:   1.125rem;   /*  18px */
  --text-lg:   1.25rem;    /*  20px */
  --text-xl:   1.5rem;     /*  24px */
  --text-2xl:  2rem;       /*  32px */
  --text-3xl:  2.5rem;     /*  40px */
  --text-4xl:  3.25rem;    /*  52px */
  --text-5xl:  4rem;       /*  64px */

  /* --- Typography: Line Heights --- */
  --leading-tight:  1.2;
  --leading-snug:   1.4;
  --leading-normal: 1.7;
  --leading-loose:  2.0;

  /* --- Typography: Letter Spacing --- */
  --tracking-tight:  -0.01em;
  --tracking-normal:  0.02em;
  --tracking-wide:    0.08em;
  --tracking-wider:   0.15em;
  --tracking-widest:  0.25em;

  /* --- Spacing --- */
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;
  --space-16:  4rem;
  --space-20:  5rem;
  --space-24:  6rem;
  --space-32:  8rem;

  /* --- Layout --- */
  --maxw:           1200px;
  --maxw-text:       720px;
  --maxw-narrow:     560px;
  --container-px:    clamp(1.25rem, 5vw, 3rem);
  --nav-height:      72px;

  /* --- Border Radius --- */
  --radius-sm:  2px;
  --radius:     4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm:  0 1px 3px rgba(45, 74, 62, 0.06), 0 1px 2px rgba(45, 74, 62, 0.04);
  --shadow:     0 4px 12px rgba(45, 74, 62, 0.08), 0 2px 4px rgba(45, 74, 62, 0.05);
  --shadow-md:  0 8px 24px rgba(45, 74, 62, 0.10), 0 4px 8px rgba(45, 74, 62, 0.06);
  --shadow-lg:  0 16px 48px rgba(45, 74, 62, 0.12), 0 8px 16px rgba(45, 74, 62, 0.07);

  /* --- Transitions --- */
  --transition-fast:   150ms ease;
  --transition:        250ms ease;
  --transition-slow:   400ms ease;

  /* --- Z-Index Scale --- */
  --z-base:    0;
  --z-raised:  10;
  --z-overlay: 100;
  --z-nav:     200;
  --z-modal:   300;
  --z-toast:   400;
}


/* =============================================================================
   2. RESET
   ============================================================================= */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  tab-size: 4;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  font-family: var(--font-jp-serif);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Block elements */
blockquote,
dl,
dd,
h1, h2, h3, h4, h5, h6,
hr,
figure,
p,
pre {
  overflow-wrap: break-word;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-en-serif);
  font-weight: 400;
  line-height: var(--leading-tight);
  color: var(--color-text);
}

/* Paragraphs */
p {
  line-height: var(--leading-normal);
}

/* Lists */
ol, ul, menu {
  list-style: none;
}

/* Media */
img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img,
video {
  height: auto;
}

/* Form elements */
button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  font-weight: inherit;
  line-height: inherit;
  color: inherit;
  margin: 0;
  padding: 0;
}

button,
select {
  text-transform: none;
}

button,
[type='button'],
[type='reset'],
[type='submit'] {
  -webkit-appearance: button;
  appearance: button;
  background-color: transparent;
  background-image: none;
  cursor: pointer;
  border: none;
}

button:disabled,
[type='button']:disabled,
[type='reset']:disabled,
[type='submit']:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
}

/* Tables */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Hidden */
[hidden] {
  display: none !important;
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-terracotta);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Selection */
::selection {
  background-color: var(--color-gold-light);
  color: var(--color-text);
}

/* HR */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}


/* =============================================================================
   3. ACCESSIBILITY — SKIP LINK
   ============================================================================= */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-toast);
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  background-color: var(--color-terracotta);
  color: #fff;
  font-family: var(--font-en-serif);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}


/* =============================================================================
   4. LAYOUT UTILITIES
   ============================================================================= */

/* Container */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.container--narrow {
  max-width: var(--maxw-narrow);
}

.container--text {
  max-width: var(--maxw-text);
}

/* Section spacing */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section--sm {
  padding-block: clamp(var(--space-10), 5vw, var(--space-20));
}

/* Grid helpers */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .grid--4,
  .grid--3,
  .grid--2 { grid-template-columns: 1fr; }
}

/* Flex helpers */
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* Stack utility (vertical rhythm) */
.stack > * + * {
  margin-top: var(--space-6);
}

.stack--sm > * + * {
  margin-top: var(--space-3);
}

.stack--lg > * + * {
  margin-top: var(--space-10);
}


/* =============================================================================
   5. SCROLL REVEAL ANIMATION
   ============================================================================= */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Stagger children */
.reveal-stagger > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 400ms; }


/* =============================================================================
   6. REDUCED MOTION SUPPORT
   ============================================================================= */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}


/* =============================================================================
   7. INTERNATIONALISATION (i18n) — LANGUAGE VISIBILITY
   ============================================================================= */

/*
  Usage:
    <span data-ja="日本語テキスト" data-en="English text">表示テキスト</span>
    Or two sibling elements: <span data-ja>...</span> <span data-en>...</span>

  lang attribute on <html> controls which version is visible.
*/

html[lang="ja"] [data-en]:not([data-ja]) {
  display: none !important;
}

html[lang="en"] [data-ja]:not([data-en]) {
  display: none !important;
}

/* When both data-ja and data-en are present on separate elements */
html[lang="ja"] .lang-en {
  display: none !important;
}

html[lang="en"] .lang-ja {
  display: none !important;
}


/* =============================================================================
   8. TYPOGRAPHY
   ============================================================================= */

/* Japanese serif body copy */
.text-jp {
  font-family: var(--font-jp-serif);
  line-height: var(--leading-loose);
  letter-spacing: var(--tracking-normal);
}

/* English serif display */
.text-en {
  font-family: var(--font-en-serif);
  line-height: var(--leading-snug);
}

/* Headings scale */
.h1 { font-size: clamp(var(--text-3xl), 6vw, var(--text-5xl)); font-family: var(--font-en-serif); font-weight: 300; letter-spacing: var(--tracking-tight); }
.h2 { font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl)); font-family: var(--font-en-serif); font-weight: 300; }
.h3 { font-size: clamp(var(--text-xl),  3vw, var(--text-3xl)); font-family: var(--font-en-serif); font-weight: 400; }
.h4 { font-size: var(--text-xl); font-family: var(--font-en-serif); font-weight: 400; }
.h5 { font-size: var(--text-lg); font-family: var(--font-jp-serif); font-weight: 400; }

/* Text colors */
.text-muted  { color: var(--color-text-muted); }
.text-soft   { color: var(--color-text-soft); }
.text-terra  { color: var(--color-terracotta); }
.text-forest { color: var(--color-forest); }
.text-gold   { color: var(--color-gold); }
.text-cream  { color: var(--color-cream); }

/* Font size utilities */
.text-xs   { font-size: var(--text-xs); }
.text-sm   { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg   { font-size: var(--text-lg); }
.text-xl   { font-size: var(--text-xl); }


/* =============================================================================
   9. MOBILE WORD-BREAK SAFETY NET
   ============================================================================= */

/*
  Prevent long URLs, email addresses, or unbreakable strings from
  overflowing on narrow viewports.
*/

p,
li,
dt,
dd,
td,
th,
blockquote,
figcaption,
label {
  overflow-wrap: break-word;
  word-break: break-word;       /* legacy Webkit */
}

/* Japanese: allow line breaks at any character boundary */
html[lang="ja"] p,
html[lang="ja"] li,
html[lang="ja"] .text-jp {
  word-break: normal;
  overflow-wrap: anywhere;
  line-break: strict;
}

/* Headings: prefer natural break points */
h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
  hyphens: auto;
}


/* =============================================================================
   10. BACKGROUND UTILITIES
   ============================================================================= */

.bg-cream     { background-color: var(--color-cream); }
.bg-near-white{ background-color: var(--color-near-white); }
.bg-forest    { background-color: var(--color-forest); }
.bg-surface   { background-color: var(--color-surface); }
.bg-terra     { background-color: var(--color-terracotta); }


/* =============================================================================
   11. PRINT
   ============================================================================= */

@media print {
  html {
    font-size: 12pt;
  }

  body {
    background: #fff;
    color: #000;
  }

  .site-nav-primary,
  .site-footer {
    display: none;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #555;
  }
}