/* ============================================
   theme.css - CSS Variables & Base Theme
   NoCode Platform - Orange Theme
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Primary (Orange) */
  --color-primary: #FF6B00;
  --color-primary-light: #FF8A33;
  --color-primary-lighter: #FFF0E5;
  --color-primary-dark: #E05E00;
  --color-primary-darker: #CC5500;

  /* Secondary */
  --color-secondary: #2C3E50;
  --color-secondary-light: #34495E;
  --color-secondary-dark: #1A252F;

  /* Grays */
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BDBDBD;
  --color-gray-500: #9E9E9E;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;

  /* Semantic Colors */
  --color-success: #27AE60;
  --color-success-light: #E8F8EF;
  --color-warning: #F39C12;
  --color-warning-light: #FEF5E7;
  --color-danger: #E74C3C;
  --color-danger-light: #FDEDEC;
  --color-info: #3498DB;
  --color-info-light: #EBF5FB;

  /* Text */
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-text-inverse: #FFFFFF;

  /* Backgrounds */
  --color-bg: #F8F9FA;
  --color-bg-white: #FFFFFF;
  --color-bg-dark: #2C3E50;

  /* Borders */
  --color-border: #DEE2E6;
  --color-border-light: #E9ECEF;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.8125rem;  /* 13px */
  --font-size-md: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-index layers */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-tooltip: 500;
  --z-toast: 600;

  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 64px;
  --topbar-height: 56px;
  --content-max-width: 1400px;
}


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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}


/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-gray-900);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  margin-bottom: 0.5em;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-md); }

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

small {
  font-size: var(--font-size-sm);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  background-color: var(--color-gray-100);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

::selection {
  background-color: var(--color-primary-lighter);
  color: var(--color-primary-darker);
}

/* --- Utility: visually hidden --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Text utilities --- */
.text-primary   { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted     { color: var(--color-text-muted); }
.text-success   { color: var(--color-success); }
.text-warning   { color: var(--color-warning); }
.text-danger    { color: var(--color-danger); }
.text-center    { text-align: center; }
.text-right     { text-align: right; }
.text-sm        { font-size: var(--font-size-sm); }
.text-lg        { font-size: var(--font-size-lg); }
.font-medium    { font-weight: var(--font-weight-medium); }
.font-semibold  { font-weight: var(--font-weight-semibold); }
.font-bold      { font-weight: var(--font-weight-bold); }

/* --- Spacing utilities --- */
.mt-0  { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-0  { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.p-md  { padding: var(--space-md); }
.p-lg  { padding: var(--space-lg); }

/* --- Display utilities --- */
.d-flex         { display: flex; }
.d-inline-flex  { display: inline-flex; }
.d-block        { display: block; }
.d-none         { display: none; }
.align-center   { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-sm         { gap: var(--space-sm); }
.gap-md         { gap: var(--space-md); }
.flex-1         { flex: 1; }
.flex-wrap      { flex-wrap: wrap; }