/* ========================================
   Global Styles
   日本自動車大学校 袖ケ浦校 - グローバルスタイルシート
======================================== */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-primary: #003DA5;
    --color-primary-dark: #002a75;
    --color-primary-light: #1a5dc4;
    --color-accent: #FF6B00;
    --color-accent-dark: #e55f00;
    --color-accent-light: #ff8533;
    
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-lighter: #999999;
    --color-background: #FFFFFF;
    --color-background-gray: #F5F7FA;
    --color-background-dark: #2C3E50;
    
    --color-border: #E0E0E0;
    --color-border-light: #F0F0F0;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #003DA5 0%, #0056D6 100%);
    --gradient-accent: linear-gradient(135deg, #FF6B00 0%, #FF8533 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(0, 61, 165, 0.05) 0%, rgba(0, 86, 214, 0.05) 100%);
    
    /* Typography */
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.75;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-lg) 0;
    }
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-text);
    text-align: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
    .section-title {
        font-size: 1.875rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: #FFFFFF;
}

.btn-secondary {
    background: var(--gradient-accent);
    color: #FFFFFF;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: #FFFFFF;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #FFFFFF;
}

.btn-white {
    background: #FFFFFF;
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    background: var(--color-background-gray);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Header */
.header {
    background: #FFFFFF;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 1rem;
}

.header-logo img {
    height: 38px;
    width: auto;
    display: block;
}

.header-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    display: block;
    padding: 1.5rem 0.75rem;
    color: var(--color-text);
    font-weight: 700;
    font-size: 0.8125rem;
    transition: var(--transition-base);
    white-space: nowrap;
}

.nav-item > a:hover {
    color: var(--color-primary);
    background: var(--color-background-gray);
}

/* Megamenu */
.megamenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #FFFFFF;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: var(--z-dropdown);
}

.nav-item:hover .megamenu {
    opacity: 1;
    visibility: visible;
}

.megamenu-content ul {
    list-style: none;
}

.megamenu-content li {
    margin-bottom: 0.5rem;
}

.megamenu-content li:last-child {
    margin-bottom: 0;
}

.megamenu-content a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.megamenu-content a:hover {
    background: var(--color-background-gray);
    color: var(--color-primary);
}

.megamenu-content i {
    color: var(--color-primary);
    font-size: 1.125rem;
}

/* Header CTA */
.header-cta {
    display: flex;
    gap: 0.5rem;
}

.header-cta .btn {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    white-space: nowrap;
}

.header-cta .btn i {
    font-size: 0.75rem;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: #FFFFFF;
    overflow-y: auto;
    z-index: 1010;
}

.mobile-menu.active {
    display: block;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    background: #FFFFFF;
    border-top: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-nav.active {
    max-height: calc(100vh - 80px);
    overflow-y: auto;
}

.mobile-nav-list {
    list-style: none;
    padding: var(--spacing-sm) 0;
}

.mobile-nav-item {
    border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--spacing-md);
    background: transparent;
    border: none;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
}

.mobile-nav-toggle i {
    transition: var(--transition-base);
}

.mobile-nav-toggle.active i {
    transform: rotate(180deg);
}

.mobile-subnav {
    list-style: none;
    background: var(--color-background-gray);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-subnav.active {
    max-height: 500px;
}

.mobile-subnav a {
    display: block;
    padding: 0.875rem var(--spacing-lg);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border-light);
}

.mobile-subnav a:hover {
    background: #FFFFFF;
    color: var(--color-primary);
}

/* Mobile Submenu (alternative naming) */
.mobile-submenu {
    list-style: none;
    background: var(--color-background-gray);
    display: none;
    padding: 0;
}

.mobile-submenu a {
    display: block;
    padding: 0.875rem var(--spacing-lg);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border-light);
    text-decoration: none;
}

.mobile-submenu a:hover {
    background: #FFFFFF;
    color: var(--color-primary);
}

.mobile-nav-item > a {
    display: block;
    padding: 1rem var(--spacing-md);
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-buttons {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mobile-nav-buttons .btn {
    width: 100%;
    text-align: center;
}

.mobile-nav-cta {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Footer */
.footer {
    background: var(--color-background-dark);
    color: #FFFFFF;
}

.footer-main {
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.footer-logo img {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #FFFFFF;
    font-size: 1.5rem;
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

.footer-heading {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.625rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: #FFFFFF;
    padding-left: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md) 0;
}

.footer-bottom-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-copyright {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.footer-legal a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal a:hover {
    color: #FFFFFF;
}

/* Mobile CTA Bar */
.mobile-cta-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #FFFFFF;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: var(--z-fixed);
}

.mobile-cta-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    padding: 0.75rem;
    color: var(--color-text);
    border-right: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.mobile-cta-btn:last-child {
    border-right: none;
}

.mobile-cta-btn i {
    font-size: 1.25rem;
}

.mobile-cta-btn span {
    font-size: 0.75rem;
    font-weight: 700;
}

.mobile-cta-btn.primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
}

.mobile-cta-btn:hover {
    background: var(--color-background-gray);
}

.mobile-cta-btn.primary:hover {
    background: var(--color-primary-dark);
    color: #FFFFFF;
}

/* Responsive Design */
@media (max-width: 1150px) {
    .header-nav {
        display: none;
    }
    
    .header-cta {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-nav {
        display: block;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-column:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header-container {
        height: 60px;
    }
    
    .header-logo img {
        height: 35px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .mobile-cta-bar {
        display: flex;
    }
    
    body {
        padding-bottom: 70px;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

/* Animation Classes */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.active {
    opacity: 1;
    transform: translateY(0);
}