/**
 * common.css
 * yomirank.jp - Shared CSS variables and base styles
 */

:root {
    --primary-dark: #0F2638;
    --primary-blue: #1C3F5E;
    --primary-light: #2C5F7E;
    --accent-orange: #FF9900;
    --accent-gold: #FFD700;
    --bg-white: #FFFFFF;
    --bg-gray-light: #F5F5F5;
    --bg-gray: #F8F9FA;
    --text-dark: #333333;
    --text-gray: #666666;
    --text-light: #6C757D;
    --border-light: #E9ECEF;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-xxl: 32px;

    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 18px rgba(15, 38, 56, 0.12);
    --shadow-lg: 0 12px 30px rgba(15, 38, 56, 0.22);

    --header-height: 60px;
    --sidebar-width: 320px;
}

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

html {
    height: 100%;
}

body {
    font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(14px, 1.3vw + 10px, 16px);
    line-height: 1.6;
    color: var(--text-dark);
    background: radial-gradient(circle at top, #21466A 0, #0F2638 40%, #050B10 100%);
    min-height: 100vh;
}

/* Header */
.header {
    background: rgba(15, 38, 56, 0.95);
    backdrop-filter: blur(12px);
    color: white;
    height: var(--header-height);
    box-shadow: 0 1px 0 rgba(255,255,255,0.04);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.logo-text {
    font-size: clamp(1.1rem, 2.4vw, 1.3rem);
    font-weight: 700;
    letter-spacing: 0.03em;
}

.nav-badge {
    background: var(--accent-gold);
    color: var(--primary-dark);
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.75em;
    font-weight: 700;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9em;
    padding: 8px 12px;
    border-radius: 999px;
    transition: all 0.2s ease;
    font-weight: 400;
    white-space: nowrap;
}

.nav-link:hover {
    color: white;
}

.nav-link.active {
    color: white;
    font-weight: 700;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    margin-left: 10px;
    border-radius: 999px;
    transition: background 0.2s ease;
}

.nav-toggle:hover {
    background: rgba(255,255,255,0.08);
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #ffffff;
    margin: 4px 0;
    transition: all 0.3s ease;
    border-radius: 999px;
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* Footer */
.footer {
    background: transparent;
    color: rgba(255,255,255,0.7);
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    font-size: 0.8em;
}

.footer-links {
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    margin: 0 var(--spacing-md);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--accent-gold);
}

.affiliate-disclosure {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.85em;
    line-height: 1.6;
}

/* Footer Social Links */
.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    font-size: 0.9em;
    font-weight: 500;
    transition: all 0.2s ease;
}

.footer-social a:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.3);
    color: white;
    transform: translateY(-2px);
}

.footer-social svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* note.com brand color on hover */
.footer-social a.social-note:hover {
    background: rgba(65, 197, 143, 0.2);
    border-color: rgba(65, 197, 143, 0.5);
}

/* X (Twitter) brand color on hover */
.footer-social a.social-x:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Responsive - Tablet */
@media (max-width: 1024px) {
    .nav-toggle {
        display: block;
    }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    body {
        font-size: clamp(13px, 4vw, 15px);
    }

    .header {
        height: auto;
    }

    .nav-container {
        flex-wrap: wrap;
        align-items: center;
        padding: 8px 12px;
        row-gap: 6px;
    }

    .nav-left {
        order: 1;
    }

    .nav-toggle {
        display: block;
        order: 2;
    }

    .nav-right {
        order: 4;
        width: 100%;
        justify-content: center;
        padding-top: 6px;
    }

    .nav-links {
        display: none;
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-sm);
        width: 100%;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-link {
        padding: 6px 16px;
        font-size: 0.9em;
        flex: 0 1 auto;
    }
}