/* ══════════════════════════════════
   NIYTT Global Styles — Dark Premium
   ══════════════════════════════════ */

/* CSS Variables */
:root {
    /* Backgrounds */
    --bg-primary: #0A0A0A;
    --bg-secondary: #111111;
    --bg-tertiary: #1A1A1A;
    --bg-glass: rgba(255, 255, 255, 0.03);

    /* Text */
    --text-primary: #F0F0F0;
    --text-secondary: #888888;
    --text-muted: #4A4A4A;

    /* Accent */
    --accent-primary: #F0F0F0;
    --accent-hover: #CCCCCC;
    --accent-highlight: #6DA3F0;
    --accent-glow: rgba(109, 163, 240, 0.15);

    /* Borders */
    --border-light: #1E1E1E;
    --border-subtle: #161616;

    /* Typography */
    --font-primary: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-title-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --text-hero: clamp(3rem, 7vw, 5.5rem);
    --text-h1: clamp(2rem, 4vw, 3rem);
    --text-h2: clamp(1.5rem, 3vw, 2rem);
    --text-h3: 1.25rem;
    --text-body: 1rem;
    --text-small: 0.875rem;

    --leading-tight: 1.3;
    --leading-normal: 1.7;
    --leading-relaxed: 1.8;

    --weight-regular: 400;
    --weight-medium: 500;
    --weight-bold: 700;

    /* Layout */
    --max-width: 1200px;
    --content-width: 800px;
    --header-height: 64px;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;

    /* Shadows */
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(109, 163, 240, 0.1);
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-body);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol { list-style: none; }

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ══════════════════════════════════
   Layout
   ══════════════════════════════════ */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

/* ══════════════════════════════════
   Header — Glass Effect
   ══════════════════════════════════ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal), backdrop-filter var(--transition-normal);
}

.site-header.scrolled {
    background-color: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.site-logo {
    font-family: var(--font-title-en);
    font-size: 1.25rem;
    font-weight: var(--weight-bold);
    letter-spacing: 0.1em;
    color: var(--text-primary);
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.1);
    transition: text-shadow var(--transition-normal);
}

.site-logo:hover {
    text-shadow: 0 0 40px rgba(109, 163, 240, 0.3);
    color: var(--text-primary);
}

/* Desktop Navigation */
.nav-menu {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.nav-menu a {
    font-size: var(--text-small);
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color var(--transition-normal);
    position: relative;
    padding-bottom: 4px;
}

/* Animated underline on hover */
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--accent-highlight);
    transition: width 0.3s ease, left 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.current::after {
    width: 100%;
    left: 0;
}

.nav-menu a:hover,
.nav-menu a.current,
.nav-menu .current-menu-item > a {
    color: var(--text-primary);
}

.nav-menu a.current,
.nav-menu .current-menu-item > a {
    font-weight: var(--weight-bold);
}

/* Hamburger */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu Overlay */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.mobile-menu.open {
    display: flex;
    opacity: 1;
}

.mobile-menu a {
    font-family: var(--font-title-en);
    font-size: var(--text-h2);
    font-weight: var(--weight-bold);
    color: var(--text-primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.mobile-menu a:hover {
    color: var(--accent-highlight);
    text-shadow: 0 0 30px var(--accent-glow);
}

/* ══════════════════════════════════
   Footer — Refined
   ══════════════════════════════════ */
.site-footer {
    border-top: 1px solid var(--border-light);
    padding: var(--space-2xl) 0 var(--space-xl);
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-highlight), transparent);
}

.footer-logo {
    font-family: var(--font-title-en);
    font-size: 1.1rem;
    font-weight: var(--weight-bold);
    letter-spacing: 0.15em;
    margin-bottom: var(--space-sm);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.footer-copy {
    font-size: var(--text-small);
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* ══════════════════════════════════
   Cards — Glass + Depth
   ══════════════════════════════════ */
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.card {
    border-radius: 12px;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(20, 20, 20, 0.9), rgba(15, 15, 15, 0.95));
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: all var(--transition-normal);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    z-index: 1;
}

.card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.08);
}

.card-link {
    display: block;
}

.card-image {
    position: relative;
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.5s ease;
}

.card:hover .card-image img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
    color: var(--text-muted);
    font-family: var(--font-title-en);
    font-size: var(--text-h3);
    font-weight: var(--weight-bold);
    letter-spacing: 0.2em;
}

.card-body {
    padding: var(--space-md) var(--space-md) var(--space-lg);
}

.card-title {
    font-size: var(--text-h3);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-xs);
    line-height: var(--leading-tight);
    transition: color var(--transition-fast);
}

.card:hover .card-title {
    color: var(--accent-highlight);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-small);
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.card-views {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.card-views svg { flex-shrink: 0; }

.card-excerpt {
    font-size: var(--text-small);
    color: var(--text-secondary);
    line-height: var(--leading-normal);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ══════════════════════════════════
   Pagination — Refined
   ══════════════════════════════════ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-2xl);
}

.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-xs);
    border-radius: 8px;
    font-size: var(--text-small);
    color: var(--text-muted);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.page-link:hover {
    border-color: var(--border-light);
    color: var(--text-primary);
    background-color: var(--bg-glass);
}

.page-link.active {
    background: linear-gradient(135deg, var(--accent-highlight), #5A8BD4);
    color: #fff;
    font-weight: var(--weight-bold);
    box-shadow: 0 2px 12px rgba(109, 163, 240, 0.3);
}

/* ══════════════════════════════════
   Like & Share — Polished
   ══════════════════════════════════ */
.post-actions {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    margin: var(--space-xl) 0;
}

.like-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    font-size: var(--text-small);
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    background: var(--bg-glass);
}

.like-btn:hover {
    border-color: #ef4444;
    color: #ef4444;
    box-shadow: 0 0 16px rgba(239, 68, 68, 0.15);
}

.like-btn.liked {
    border-color: #ef4444;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
}

.like-btn.liked .like-icon {
    fill: #ef4444;
    stroke: #ef4444;
}

.share-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--text-muted);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.share-btn:hover {
    background-color: var(--bg-glass);
    color: var(--text-primary);
    border-color: var(--border-light);
    transform: translateY(-2px);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    background: rgba(240, 240, 240, 0.95);
    color: var(--bg-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    font-size: var(--text-small);
    font-weight: var(--weight-medium);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 9999;
    pointer-events: none;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ══════════════════════════════════
   Ad Slots
   ══════════════════════════════════ */
.ad-slot-top,
.ad-slot-bottom {
    margin: var(--space-lg) 0;
    min-height: 0;
}

/* ══════════════════════════════════
   Page Header — Embossed
   ══════════════════════════════════ */
.page-header {
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-xl);
    text-align: center;
    position: relative;
}

.page-header h1 {
    font-family: var(--font-title-en);
    font-size: var(--text-h1);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-xs);
    letter-spacing: 0.1em;
    text-shadow:
        0 1px 0 rgba(255, 255, 255, 0.05),
        0 -1px 0 rgba(0, 0, 0, 0.8),
        0 0 40px rgba(109, 163, 240, 0.08);
}

.page-header p {
    color: var(--text-muted);
    font-size: var(--text-body);
    letter-spacing: 0.05em;
}

/* Decorative line under page header */
.page-header::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-highlight), transparent);
    margin: var(--space-lg) auto 0;
    border-radius: 2px;
}

/* ══════════════════════════════════
   Noise Texture Overlay
   ══════════════════════════════════ */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9998;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* ══════════════════════════════════
   Scroll Progress Bar
   ══════════════════════════════════ */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-highlight), #5A8BD4, var(--accent-highlight));
    z-index: 10001;
    transition: none;
    box-shadow: 0 0 8px rgba(109, 163, 240, 0.4);
}

/* ══════════════════════════════════
   Scroll Animations
   ══════════════════════════════════ */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ══════════════════════════════════
   Card Stagger Animation
   ══════════════════════════════════ */
.card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease, box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.card.card-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ══════════════════════════════════
   Marquee — Flowing Text
   ══════════════════════════════════ */
.marquee {
    overflow: hidden;
    white-space: nowrap;
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
}

.marquee::before,
.marquee::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 80px;
    z-index: 1;
    pointer-events: none;
}

.marquee::before {
    left: 0;
    background: linear-gradient(90deg, var(--bg-primary), transparent);
}

.marquee::after {
    right: 0;
    background: linear-gradient(90deg, transparent, var(--bg-primary));
}

.marquee-track {
    display: inline-flex;
    animation: marquee-scroll 25s linear infinite;
}

.marquee-track span {
    font-family: var(--font-title-en);
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    font-weight: var(--weight-bold);
    letter-spacing: 0.3em;
    color: var(--text-muted);
    padding: 0 var(--space-lg);
    text-transform: uppercase;
    opacity: 0.5;
}

@keyframes marquee-scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ══════════════════════════════════
   Guestbook — Underline Inputs
   ══════════════════════════════════ */
.guestbook {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--border-light);
    position: relative;
}

.guestbook-title {
    font-family: var(--font-title-en);
    font-size: var(--text-h2);
    font-weight: var(--weight-bold);
    text-align: center;
    margin-bottom: var(--space-xs);
    letter-spacing: 0.1em;
    text-shadow:
        0 1px 0 rgba(255, 255, 255, 0.05),
        0 -1px 0 rgba(0, 0, 0, 0.8);
}

.guestbook-title + .guestbook-form {
    margin-top: var(--space-xl);
}

.guestbook-form {
    display: flex;
    gap: var(--space-sm);
    max-width: var(--content-width);
    margin: var(--space-xl) auto;
    align-items: flex-end;
}

/* Underline-style inputs */
.guestbook-form input {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--text-muted);
    border-radius: 0;
    padding: 0.75rem 0;
    color: var(--text-primary);
    transition: border-color var(--transition-normal);
    font-size: var(--text-small);
}

.guestbook-form input::placeholder {
    color: var(--text-muted);
    font-size: var(--text-small);
}

.guestbook-form input:focus {
    outline: none;
    border-bottom-color: var(--accent-highlight);
    box-shadow: 0 1px 0 var(--accent-highlight);
}

.guestbook-form input[name="nickname"] {
    width: 100px;
    flex-shrink: 0;
}

.guestbook-form input[name="message"] {
    flex: 1;
    min-width: 0;
}

.guestbook-form button {
    padding: 0.6rem 1.5rem;
    background: transparent;
    color: var(--accent-highlight);
    border: 1px solid var(--accent-highlight);
    border-radius: 999px;
    font-size: var(--text-small);
    font-weight: var(--weight-medium);
    letter-spacing: 0.05em;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    white-space: nowrap;
}

.guestbook-form button:hover {
    background: var(--accent-highlight);
    color: #fff;
    box-shadow: 0 0 20px rgba(109, 163, 240, 0.2);
}

.guestbook-messages {
    max-width: var(--content-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.guestbook-item {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.guestbook-nickname {
    font-size: var(--text-small);
    font-weight: var(--weight-bold);
    color: var(--accent-highlight);
    flex-shrink: 0;
}

.guestbook-message {
    font-size: var(--text-small);
    color: var(--text-secondary);
    flex: 1;
    word-break: break-word;
}

.guestbook-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

@media (max-width: 767px) {
    .guestbook-form {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .guestbook-form input[name="nickname"] {
        width: 80px;
    }

    .guestbook-form input[name="message"] {
        flex-basis: calc(100% - 92px);
    }

    .guestbook-item {
        flex-wrap: wrap;
        gap: 4px;
    }

    .guestbook-date {
        width: 100%;
    }
}

/* ══════════════════════════════════
   Responsive: Mobile
   ══════════════════════════════════ */
@media (max-width: 767px) {
    .menu-toggle { display: flex; }
    .nav-menu { display: none; }
}

/* ══════════════════════════════════
   Responsive: Tablet+
   ══════════════════════════════════ */
@media (min-width: 768px) {
    .nav-menu { display: flex; }
    .menu-toggle { display: none; }
    .mobile-menu { display: none !important; }
}

/* ══════════════════════════════════
   Responsive: Desktop
   ══════════════════════════════════ */
@media (min-width: 1200px) {
    .container {
        padding: 0 var(--space-lg);
    }
}