/* ===== FONT DECLARATIONS ===== */
@font-face {
    font-family: 'CSP';
    src: url('../assets/fonts/csp.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'HGRPP1';
    src: url('../assets/fonts/hgrpp1.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Color Palette */
    --primary-color: #ffffff;
    --accent-color: #ff00f8;
    --background-dark: #000000;
    --background-secondary: #111111;
    --background-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    
    /* Responsive Spacing - scales with viewport */
    --spacing-xs: max(0.25rem, 0.5vw);
    --spacing-sm: max(0.5rem, 0.8vw);
    --spacing-md: max(1rem, 1.2vw);
    --spacing-lg: max(1.5rem, 1.8vw);
    --spacing-xl: max(2rem, 2.4vw);
    --spacing-xxl: max(3rem, 3.6vw);
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(255, 0, 248, 0.1);
    --shadow-md: 0 4px 6px rgba(255, 0, 248, 0.15);
    --shadow-lg: 0 10px 25px rgba(255, 0, 248, 0.2);
    --shadow-glow: 0 0 20px rgba(255, 0, 248, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container Widths */
    --container-sm: 576px;
    --container-md: 768px;
    --container-lg: 992px;
    --container-xl: 1200px;
    --container-xxl: 1400px;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: 'CSP', 'HGRPP1', Arial, sans-serif;
    background: var(--background-dark) url('../assets/images/site/background.png') center center / cover no-repeat fixed;
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Japanese text styling */
:lang(ja),
.japanese-text,
.jp {
    font-family: 'HGRPP1', 'CSP', Arial, sans-serif;
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--background-secondary);
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: #ff33ff;
    box-shadow: var(--shadow-glow);
}

::-webkit-scrollbar-corner {
    background: var(--background-secondary);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--accent-color) var(--background-secondary);
}

/* ===== CONTAINER SYSTEM ===== */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-xl { max-width: var(--container-xl); }
.container-xxl { max-width: var(--container-xxl); }

/* Enhanced containers with background and styling */
.content-container {
    background: rgba(17, 17, 17, 0.8);
    border: 1px solid rgba(255, 0, 248, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) auto;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.content-container:hover {
    border-color: rgba(255, 0, 248, 0.4);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.glass-container {
    background: rgba(26, 26, 26, 0.7);
    border: 1px solid rgba(255, 0, 248, 0.15);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-lg);
    backdrop-filter: blur(15px);
    box-shadow: var(--shadow-sm);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

a:hover {
    color: #ff33ff;
    text-shadow: 0 0 8px rgba(255, 0, 248, 0.6);
    text-decoration: underline;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    background: transparent;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--background-dark);
    border-color: var(--accent-color);
}

.btn-primary:hover {
    background: #ff33ff;
    border-color: #ff33ff;
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.btn-outline {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-outline:hover {
    background: var(--accent-color);
    color: var(--background-dark);
    box-shadow: var(--shadow-glow);
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.bg-dark { background-color: var(--background-dark); }
.bg-secondary { background-color: var(--background-secondary); }
.bg-tertiary { background-color: var(--background-tertiary); }

.glow {
    filter: drop-shadow(0 0 10px rgba(255, 0, 248, 0.5));
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Screen reader only content */
.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;
}

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

/* Extra large devices (large desktops, 1400px and up) */
@media (min-width: 1400px) {
    .carousel-container {
        max-width: 35vw; /* Larger on big screens */
    }
    
    .carousel-slide img {
        height: 35vw;
    }
    
    .carousel-slide.loading {
        min-height: 35vw;
    }
    
    .carousel-slide-fallback {
        height: 35vw;
    }
    
    .welcome-title {
        font-size: clamp(3rem, 5vw, 6rem);
    }
    
    .content-sidebar {
        padding: var(--spacing-xl);
    }
    
    .blog-card,
    .chapter-card {
        max-width: 22vw;
    }
    
    .twitter-embed-container {
        max-width: 22vw;
    }
}

/* Large devices (desktops, 992px and up) */
@media (max-width: 1199.98px) {
    .container {
        max-width: var(--container-lg);
    }
    
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.875rem; }
}

/* Medium devices (tablets, 768px and up) */
@media (max-width: 991.98px) {
    .container {
        max-width: var(--container-md);
        padding: 0 var(--spacing-lg);
    }
    
    .content-container {
        padding: var(--spacing-lg);
        margin: var(--spacing-md) auto;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    ::-webkit-scrollbar {
        width: 8px;
    }
}

/* Small devices (landscape phones, 576px and up) */
@media (max-width: 767.98px) {
    html {
        font-size: 14px;
    }
    
    .container {
        max-width: var(--container-sm);
        padding: 0 var(--spacing-md);
    }
    
    .content-container {
        padding: var(--spacing-md);
        margin: var(--spacing-sm) auto;
        border-radius: var(--border-radius-md);
    }
    
    .glass-container {
        padding: var(--spacing-md);
        border-radius: var(--border-radius-lg);
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.125rem; }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
}

/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575.98px) {
    html {
        font-size: 13px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .content-container {
        padding: var(--spacing-sm);
        margin: var(--spacing-xs) auto;
    }
    
    .glass-container {
        padding: var(--spacing-sm);
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.125rem; }
    
    ::-webkit-scrollbar {
        width: 6px;
    }
    
    body {
        background-attachment: scroll; /* Better performance on mobile */
    }
}

/* ===== MOBILE-SPECIFIC OPTIMIZATIONS ===== */
@media (max-width: 767.98px) {
    /* Touch-friendly hover states */
    .btn:hover {
        transform: none; /* Disable transform on mobile */
    }
    
    /* Improve touch targets */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Reduce animations on mobile for better performance */
    *, *::before, *::after {
        animation-duration: 0.3s !important;
        animation-delay: 0s !important;
    }
}

/* ===== DARK MODE SPECIFIC STYLES ===== */
@media (prefers-color-scheme: dark) {
    /* Additional dark mode optimizations if needed */
    body {
        background-color: var(--background-dark);
    }
}

/* ===== ACCESSIBILITY ===== */
@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 styles for accessibility */
*:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.btn:focus {
    box-shadow: 0 0 0 3px rgba(255, 0, 248, 0.3);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --accent-color: #ff66ff;
        --text-primary: #ffffff;
        --text-secondary: #ffffff;
    }
}

/* ===== INDEX PAGE LAYOUT ===== */
.main-content {
    padding-top: 90px; /* Account for navigation height + margin */
    padding-bottom: 40px; /* Reduced bottom padding */
    min-height: 100vh;
}

.content-grid-section {
    padding: var(--spacing-lg) 0; /* Reduced from xl */
}

.welcome-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.welcome-title {
    font-size: clamp(2rem, 4vw, 4rem); /* Responsive font size */
    font-weight: 700;
    margin-bottom: 0; /* Remove bottom margin since it's in its own container */
    color: var(--text-primary); /* White color */
}

/* New 3-Column Layout */
.three-column-layout {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
    min-height: 600px;
}

.left-column,
.center-column,
.right-column {
    width: 100%;
    height: 100%;
}

.left-column {
    display: flex;
    flex-direction: column;
}

/* Unified content sidebar container */
.content-sidebar {
    background: rgba(17, 17, 17, 0.8);
    border: 1px solid rgba(255, 0, 248, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.content-sidebar:hover {
    border-color: rgba(255, 0, 248, 0.3);
    box-shadow: var(--shadow-lg);
}

.content-sidebar .blog-section,
.content-sidebar .chapter-section {
    margin: 0;
}

.content-sidebar .blog-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 0, 248, 0.1);
}

.content-sidebar h2 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.center-column {
    display: flex;
    align-items: flex-start; /* Changed from center to flex-start */
    justify-content: center;
}

.carousel-wrapper-main {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.right-column {
    display: flex;
    align-items: flex-start;
}

.twitter-section {
    margin: 0;
}

.twitter-section h2 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    font-size: 1.5rem;
}

.twitter-embed-container {
    max-width: 25vw; /* Responsive width */
    margin: 0 auto;
    width: 100%;
}

.twitter-tweet {
    margin: 0 auto !important;
}

/* ===== RESPONSIVE LAYOUT ADJUSTMENTS ===== */

/* Large devices adjustments */
@media (max-width: 1199.98px) {
    .welcome-title {
        font-size: 2.5rem;
    }
    
    .content-grid {
        gap: var(--spacing-lg);
    }
}

/* Medium devices (tablets) */
@media (max-width: 991.98px) {
    .main-content {
        padding-top: 80px; /* Mobile navigation height + margin */
        padding-bottom: 40px;
    }
    
    .content-grid-section {
        padding: var(--spacing-md) 0;
    }
    
    .welcome-header {
        margin-bottom: var(--spacing-lg);
    }
    
    .welcome-title {
        font-size: 2.25rem;
    }
    
    /* Stack content vertically on tablets */
    .three-column-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .content-sidebar {
        padding: var(--spacing-md);
    }
    
    .content-sidebar .blog-section {
        margin-bottom: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }
    
    .center-column {
        order: -1; /* Put carousel at the top */
    }
    
    .twitter-embed-container {
        max-width: 100%;
    }
}

/* Small devices (landscape phones) */
@media (max-width: 767.98px) {
    .main-content {
        padding-top: 75px; /* Mobile navigation height + margin */
        padding-bottom: 40px;
    }
    
    .content-grid-section {
        padding: var(--spacing-sm) 0;
    }
    
    .welcome-header {
        margin-bottom: var(--spacing-md);
    }
    
    .welcome-title {
        font-size: 1.875rem;
    }
    
    .three-column-layout {
        gap: var(--spacing-md);
    }
    
    .content-sidebar {
        padding: var(--spacing-sm);
    }
    
    .content-sidebar .blog-section {
        margin-bottom: var(--spacing-sm);
        padding-bottom: var(--spacing-sm);
    }
    
    .blog-section h2,
    .twitter-section h2,
    .chapter-section h2 {
        font-size: 1.3rem;
        text-align: center;
    }
}

/* Extra small devices (portrait phones) */
@media (max-width: 575.98px) {
    .main-content {
        padding-top: 50px;
        padding-bottom: 50px;
    }
    
    .content-grid-section {
        padding: var(--spacing-xs) 0;
    }
    
    .welcome-header {
        margin-bottom: var(--spacing-sm);
    }
    
    .welcome-title {
        font-size: 1.5rem;
    }
    
    .three-column-layout {
        gap: var(--spacing-sm);
    }
    
    .content-sidebar {
        padding: var(--spacing-xs);
    }
    
    .content-sidebar .blog-section {
        margin-bottom: var(--spacing-xs);
        padding-bottom: var(--spacing-xs);
    }
    
    .content-sidebar h2 {
        font-size: 1.1rem;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    body {
        background: white !important;
        color: black !important;
    }
    
    .content-container {
        background: white !important;
        border: 1px solid black !important;
        box-shadow: none !important;
    }
    
    .btn {
        border: 1px solid black !important;
        background: white !important;
        color: black !important;
    }
    
    .main-content {
        padding: 0 !important;
    }
    
    .twitter-embed-container {
        display: none !important;
    }
}