/*
 * Studio Una Design System - Minimal Gallery Theme
 * Unified modern design system for all plan pages
 * Theme: data-theme="minimal" - Gallery-focused, ultra-clean design
 */

/* =============================================================================
   CORE DESIGN TOKENS
   ============================================================================= */

:root {
    /* Brand Identity */
    --brand-name: "studio una";
    --brand-tagline: "普通の写真館では撮れないお洒落な写真";
    --brand-location: "さいたま市浦和";
  
    /* Container & Grid System */
    --container-max: 1440px;
    --content-max: 1200px;
    --grid-columns: 12;
    --grid-gap: clamp(1rem, 3vw, 2rem);
    --grid-margin: clamp(2rem, 6vw, 4rem);
  
    /* Mathematical Ratios */
    --ratio-golden: 1.618;
    --ratio-square: 1;
    --ratio-photo: 1.5;
    --ratio-wide: 2.39;
    --ratio-portrait: 0.75;
  
    /* Z-index System */
    --z-base: 1;
    --z-elevated: 10;
    --z-sticky: 100;
    --z-overlay: 1000;
    --z-modal: 10000;
    --z-system: 100000;
}

/* MINIMAL GALLERY THEME - Ultra-clean, photography-focused */
[data-theme="minimal"], body {
    /* Color Palette - Gallery-inspired */
    --color-white: #fff;
    --color-gallery: #f8f8f8;
    --color-graphite: #2d2d2d;
    --color-charcoal: #454545;
    --color-silver: #999;
    --color-gold: #c9a96e;
    --color-red: #d63031;
    --color-blue: #0984e3;
    --color-green: #00b894;
  
    /* Semantic Color Mapping */
    --color-text-primary: var(--color-graphite);
    --color-text-secondary: var(--color-charcoal);
    --color-text-muted: var(--color-silver);
    --color-text-inverse: var(--color-white);
    --color-surface-primary: var(--color-white);
    --color-surface-secondary: var(--color-gallery);
    --color-accent-primary: var(--color-gold);
    --color-accent-critical: var(--color-red);
    --color-accent-info: var(--color-blue);
    --color-accent-success: var(--color-green);
  
    /* Typography System */
    --font-primary: "Inter", -apple-system, blinkmacsystemfont, sans-serif;
    --font-japanese: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
    --font-display: "Noto Serif JP", "Yu Mincho", serif;
    --font-mono: "JetBrains Mono", "SF Mono", monaco, monospace;
  
    /* Typography Scale (Perfect Fourth - 1.333) */
    --font-xs: clamp(0.75rem, 0.69rem + 0.31vw, 0.875rem);
    --font-sm: clamp(0.875rem, 0.81rem + 0.36vw, 1rem);
    --font-base: clamp(1rem, 0.875rem + 0.5vw, 1.125rem);
    --font-md: clamp(1.125rem, 1rem + 0.63vw, 1.375rem);
    --font-lg: clamp(1.333rem, 1.17rem + 0.81vw, 1.75rem);
    --font-xl: clamp(1.777rem, 1.55rem + 1.14vw, 2.375rem);
    --font-2xl: clamp(2.369rem, 2.06rem + 1.54vw, 3.125rem);
    --font-3xl: clamp(3.157rem, 2.74rem + 2.09vw, 4.25rem);
    --font-4xl: clamp(4.209rem, 3.64rem + 2.84vw, 5.625rem);
  
    /* Spacing Scale (Mathematical 8px baseline) */
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-6: 1.5rem;     /* 24px */
    --space-8: 2rem;       /* 32px */
    --space-12: 3rem;      /* 48px */
    --space-16: 4rem;      /* 64px */
    --space-24: 6rem;      /* 96px */
    --space-32: 8rem;      /* 128px */
  
    /* Motion System */
    --timing-instant: 0ms;
    --timing-micro: 100ms;
    --timing-quick: 200ms;
    --timing-moderate: 300ms;
    --timing-deliberate: 500ms;
    --timing-patient: 800ms;
    --ease-linear: linear;
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-precise: cubic-bezier(0.25, 0.1, 0.25, 1);
  
    /* Minimal Effects */
    --surface-hover: rgba(0, 0, 0, 0.02);
    --surface-active: rgba(0, 0, 0, 0.04);
    --text-overlay: rgba(45, 45, 45, 0.9);
    --shadow-minimal: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-elevated: 0 4px 12px rgba(0, 0, 0, 0.06);
  
    /* Component Tokens */
    --btn-padding-sm: var(--space-2) var(--space-4);
    --btn-padding-md: var(--space-3) var(--space-6);
    --btn-padding-lg: var(--space-4) var(--space-8);
    --btn-radius: 8px;
    --card-padding: var(--space-6);
    --card-radius: 12px;
    --photo-radius: 8px;
    --nav-height: 4rem;
    --nav-padding: var(--space-4) var(--space-6);
  
    /* Focus Ring (Accessibility) */
    --focus-ring-width: 2px;
    --focus-ring-offset: 2px;
    --focus-ring-color: var(--color-accent-info);
}

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

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-japanese);
    font-size: var(--font-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-surface-primary);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.container-max { 
    max-width: var(--container-max); 
    margin: 0 auto; 
    padding: 0 var(--space-4);
}

.content-max { 
    max-width: var(--content-max); 
    margin: 0 auto; 
}

.grid { 
    display: grid; 
    gap: var(--grid-gap);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }

/* =============================================================================
   TYPOGRAPHY
   ============================================================================= */

.text-xs { font-size: var(--font-xs); }
.text-sm { font-size: var(--font-sm); }
.text-base { font-size: var(--font-base); }
.text-md { font-size: var(--font-md); }
.text-lg { font-size: var(--font-lg); }
.text-xl { font-size: var(--font-xl); }
.text-2xl { font-size: var(--font-2xl); }
.text-3xl { font-size: var(--font-3xl); }
.text-4xl { font-size: var(--font-4xl); }

.font-japanese { font-family: var(--font-japanese); }
.font-display { font-family: var(--font-display); }
.font-mono { font-family: var(--font-mono); }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.leading-tight { line-height: 1.25; }
.leading-snug { line-height: 1.375; }
.leading-normal { line-height: 1.5; }
.leading-relaxed { line-height: 1.625; }
.leading-loose { line-height: 2; }

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-inverse { color: var(--color-text-inverse); }
.text-accent { color: var(--color-accent-primary); }

/* =============================================================================
   SPACING UTILITIES
   ============================================================================= */

.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }
.m-12 { margin: var(--space-12); }
.m-16 { margin: var(--space-16); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.p-12 { padding: var(--space-12); }
.p-16 { padding: var(--space-16); }

.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }

.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.px-8 { padding-left: var(--space-8); padding-right: var(--space-8); }

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--btn-padding-md);
    font-family: var(--font-japanese);
    font-size: var(--font-base);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: all var(--timing-quick) var(--ease-out);
    outline: none;
}

.btn:focus {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

.btn-primary {
    background-color: var(--color-accent-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background-color: var(--color-graphite);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--color-surface-secondary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-silver);
}

.btn-secondary:hover {
    background-color: var(--surface-hover);
    border-color: var(--color-charcoal);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-text-primary);
}

.btn-outline:hover {
    background-color: var(--color-text-primary);
    color: var(--color-text-inverse);
}

/* Navigation CTA Button Override
   Purpose: Ensure consistent styling across all pages (home, plan, etc.)
   Why here: This file loads AFTER style.css, allowing us to override base styles
   Key properties: Match home page design (border-radius: 25px, padding, font-weight)
   ============================================================================= */
.navbar .btn-nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1.8rem;
    border-radius: 25px;
    font-weight: 400;
    letter-spacing: 0.08em;
    background: var(--primary-beige, #c8b8a1);
    color: var(--cream-white, #fff);
    border: none;
    transition: all var(--timing-quick, 0.2s) var(--ease-out, ease);
}

.navbar .btn-nav-cta:hover {
    background: var(--soft-brown, #a89080);
    color: var(--cream-white, #fff);
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated, 0 4px 12px rgba(0, 0, 0, 0.06));
}

/* Cards */
.card {
    background-color: var(--color-surface-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--shadow-minimal);
    transition: all var(--timing-moderate) var(--ease-out);
}

.card:hover {
    box-shadow: var(--shadow-elevated);
    transform: translateY(-2px);
}

.card-image {
    width: 100%;
    height: auto;
    border-radius: var(--photo-radius);
    margin-bottom: var(--space-4);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--photo-radius);
}

/* Aspect Ratios */
.aspect-square { aspect-ratio: var(--ratio-square); }
.aspect-photo { aspect-ratio: var(--ratio-photo); }
.aspect-golden { aspect-ratio: var(--ratio-golden); }
.aspect-wide { aspect-ratio: var(--ratio-wide); }
.aspect-portrait { aspect-ratio: var(--ratio-portrait); }

/* Visual Effects */
.rounded-sm { border-radius: 4px; }
.rounded-md { border-radius: var(--photo-radius); }
.rounded-lg { border-radius: var(--card-radius); }
.rounded-xl { border-radius: 16px; }

.shadow-sm { box-shadow: var(--shadow-minimal); }
.shadow-md { box-shadow: var(--shadow-elevated); }

.bg-primary { background-color: var(--color-surface-primary); }
.bg-secondary { background-color: var(--color-surface-secondary); }
.bg-accent { background-color: var(--color-accent-primary); }

/* Animations */
.transition { 
    transition: all var(--timing-quick) var(--ease-out); 
}

.transition-colors { 
    transition: color var(--timing-quick) var(--ease-out), 
        background-color var(--timing-quick) var(--ease-out); 
}

.transition-transform { 
    transition: transform var(--timing-moderate) var(--ease-out); 
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-grow:hover {
    transform: scale(1.02);
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */

@media (width >= 30rem) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .sm\:flex { display: flex; }
    .sm\:text-left { text-align: left; }
    .sm\:text-center { text-align: center; }
}

@media (width >= 48rem) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:flex { display: flex; }
    .md\:flex-row { flex-direction: row; }
    .md\:text-left { text-align: left; }
    .md\:text-right { text-align: right; }
}

@media (width >= 64rem) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .lg\:flex { display: flex; }
    .lg\:px-0 { padding-left: 0; padding-right: 0; }
}

/* =============================================================================
   ACCESSIBILITY & USER PREFERENCES
   ============================================================================= */

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus Management */
.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;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --color-text-primary: #000;
        --color-text-secondary: #000;
        --color-surface-primary: #fff;
        --focus-ring-width: 3px;
    }
}