/* ===========================================
   Base: Variables, Reset, Typography, Buttons, Utilities
=========================================== */

/* CSS Custom Properties */
:root {
    --color-primary: #79C2CC;
    --color-primary-light: #bce2e8;
    --color-primary-pale: #dcf4f6;
    --color-primary-hover: #e0f7fa;
    --color-primary-dark: #5bbdc0;
    --color-secondary: #aeb0c6;
    --color-text: #333;
    --color-text-light: #555;
    --color-text-muted: #666;
    --color-text-pale: #888;
    --color-bg: #fff;
    --color-bg-gray: #f5f5f5;
    --color-bg-light: #f9f9f9;
    --color-bg-pale: #f9fbfb;
    --color-border: #ddd;
    --color-border-light: #eee;
    --color-border-primary: #e0f2f2;
    --color-success: #4caf50;
    --color-warning: #ff9800;
    --color-error: #e57373;
    --color-error-dark: #d32f2f;
    --color-footer-bg: #666;
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 30px;
    --spacing-2xl: 40px;
    --spacing-3xl: 60px;
    --spacing-4xl: 80px;
    --container-width: 1000px;
    --container-padding: 20px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 10px;
    --radius-full: 50%;
    --radius-pill: 30px;
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(121, 194, 204, 0.06);
    --shadow-card-hover: 0 4px 8px rgba(0, 0, 0, 0.06), 0 12px 28px rgba(121, 194, 204, 0.12);
    --card-radius: 12px;
    --card-padding: 28px;
    --card-gap: 24px;
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --font-primary: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    --font-display: "Cormorant Garamond", Georgia, serif;
    --font-number: "Cormorant Garamond", Georgia, serif;
    --font-size-page-title: clamp(1.75rem, 4vw, 2.25rem);
    --font-size-section-title: clamp(1.375rem, 3vw, 1.625rem);
    --font-size-subsection: clamp(1.125rem, 2.5vw, 1.25rem);
    --letter-spacing-heading: 0.08em;
    --letter-spacing-wide: 0.12em;
    --breakpoint-tablet: 768px;
    --breakpoint-mobile: 767px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-primary); color: var(--color-text); line-height: 1.6; background-color: var(--color-bg); }
img { max-width: 100%; height: auto; vertical-align: bottom; }
a { color: var(--color-text); text-decoration: none; transition: var(--transition-base); }
a:hover { opacity: 0.8; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: bold; }
p { margin: 0 0 1em; }

/* Layout */
.inner { width: 90%; max-width: var(--container-width); margin: 0 auto; }
.section { padding: var(--spacing-4xl) 0; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 var(--container-padding); }

/* Typography */
h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: var(--spacing-2xl);
    border-bottom: 3px solid var(--color-text);
    display: inline-block;
    padding-bottom: var(--spacing-sm);
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}

.section-lead { text-align: center; margin-bottom: 50px; }

/* Buttons */
.btn { display: inline-block; padding: 12px 25px; border-radius: var(--radius-sm); font-weight: bold; text-align: center; cursor: pointer; transition: var(--transition-base); }
.btn:hover { opacity: 0.9; }
.btn--primary { background-color: var(--color-primary); color: var(--color-bg); }
.btn--secondary { background-color: var(--color-secondary); color: var(--color-bg); }
.btn--white { background-color: var(--color-bg); color: var(--color-primary); }
.btn--outline { background-color: var(--color-bg); color: var(--color-primary); border: 2px solid var(--color-primary-light); }
.btn--pill { border-radius: var(--radius-pill); padding: 10px 40px; }
.btn-white { display: inline-block; background-color: var(--color-bg); color: var(--color-primary); padding: 12px 40px; border-radius: var(--radius-sm); font-weight: bold; font-size: 14px; transition: var(--transition-base); letter-spacing: 0.5px; }
.btn-white:hover { background-color: var(--color-primary-pale); color: var(--color-primary-dark); opacity: 1; }

/* Utility Classes */
.pc-only { display: block; }
.sp-only { display: none; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.mt-sm { margin-top: var(--spacing-sm); } .mb-sm { margin-bottom: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); } .mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); } .mb-lg { margin-bottom: var(--spacing-lg); }

/* Accessibility */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Scroll reveal animation */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }