/*
Theme Name: Oldlee Portfolio
Theme URI: https://eeoo.dev/
Author: Oldlee (leodesign®)
Author URI: https://leodesign.cn/
Description: 个人项目导航 / 作品集主题。玻璃拟态卡片网格、分类筛选、即时搜索、项目详情弹窗、深浅色切换。由单文件 PHP 站点移植而来，使用自定义文章类型 project + 分类法 project_category。
Version: 1.0.0
Requires at least: 5.8
Tested up to: 6.5
Requires PHP: 7.2
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: oldlee-portfolio
Tags: portfolio, custom-colors, translation-ready, custom-logo, full-width-template, two-columns
*/

/* ============================================
   CSS VARIABLES & BASE
   ============================================ */
:root {
    --c-bg:          #f8f7f4;
    --c-bg-2:        #f0ede8;
    --c-surface:     rgba(255,255,255,0.72);
    --c-surface-2:   rgba(255,255,255,0.5);
    --c-border:      rgba(0,0,0,0.08);
    --c-text:        #1a1a1a;
    --c-text-2:      #6b6b6b;
    --c-accent:      #1a1a1a;
    --c-accent-2:    #3d3d3d;
    --c-tag-bg:      rgba(0,0,0,0.06);
    --c-tag-text:    #444;
    --c-glow:        rgba(0,0,0,0.12);
    --c-nav-bg:      rgba(248,247,244,0.85);
    --c-shadow:      0 2px 24px rgba(0,0,0,0.08);
    --c-shadow-lg:   0 8px 48px rgba(0,0,0,0.14);
    --radius:        20px;
    --radius-sm:     12px;
    --transition:    0.35s cubic-bezier(0.23,1,0.32,1);
}

.dark {
    --c-bg:          #0f0f11;
    --c-bg-2:        #161618;
    --c-surface:     rgba(255,255,255,0.06);
    --c-surface-2:   rgba(255,255,255,0.03);
    --c-border:      rgba(255,255,255,0.08);
    --c-text:        #f0ede8;
    --c-text-2:      #888;
    --c-accent:      #e8e4dc;
    --c-accent-2:    #b8b4ac;
    --c-tag-bg:      rgba(255,255,255,0.08);
    --c-tag-text:    #aaa;
    --c-glow:        rgba(255,255,255,0.06);
    --c-nav-bg:      rgba(15,15,17,0.88);
    --c-shadow:      0 2px 24px rgba(0,0,0,0.4);
    --c-shadow-lg:   0 8px 48px rgba(0,0,0,0.6);
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--c-bg);
    color: var(--c-text);
    font-family: 'DM Sans', 'Noto Sans SC', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
    margin: 0;
}

a { color: inherit; }

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
.bg-mesh {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}
.bg-mesh::before {
    content: '';
    position: absolute;
    width: 800px; height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(120,120,120,0.07) 0%, transparent 70%);
    top: -200px; left: -200px;
    animation: meshFloat1 20s ease-in-out infinite;
}
.bg-mesh::after {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(80,80,80,0.05) 0%, transparent 70%);
    bottom: -100px; right: -100px;
    animation: meshFloat2 25s ease-in-out infinite;
}
.dark .bg-mesh::before { background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%); }
.dark .bg-mesh::after  { background: radial-gradient(circle, rgba(200,200,255,0.03) 0%, transparent 70%); }

@keyframes meshFloat1 {
    0%,100% { transform: translate(0,0) scale(1); }
    33%     { transform: translate(80px, 60px) scale(1.1); }
    66%     { transform: translate(-40px, 100px) scale(0.9); }
}
@keyframes meshFloat2 {
    0%,100% { transform: translate(0,0) scale(1); }
    50%     { transform: translate(-80px, -60px) scale(1.15); }
}

/* ============================================
   NAVBAR
   ============================================ */
#navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: var(--c-nav-bg);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--c-border);
    transition: all var(--transition);
}
.navbar-inner {
    max-width: 1280px; margin: 0 auto; padding: 0 24px;
    height: 64px; display: flex; align-items: center;
    justify-content: space-between; gap: 32px;
}
.nav-logo {
    font-family: 'Syne', sans-serif; font-size: 22px; font-weight: 800;
    letter-spacing: -0.5px; color: var(--c-text); text-decoration: none; flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
.nav-link {
    padding: 6px 14px; border-radius: 8px; font-size: 13px; font-weight: 500;
    color: var(--c-text-2); text-decoration: none; cursor: pointer;
    transition: all 0.2s; border: none; background: none; font-family: inherit;
}
.nav-link:hover, .nav-link.active { color: var(--c-text); background: var(--c-surface); }
.nav-link.active { background: var(--c-tag-bg); color: var(--c-text); }
.nav-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.btn-icon {
    width: 36px; height: 36px; border-radius: 10px;
    border: 1px solid var(--c-border); background: var(--c-surface);
    color: var(--c-text-2); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s; flex-shrink: 0;
}
.btn-icon:hover { color: var(--c-text); background: var(--c-surface-2); }

/* Language picker */
.lang-picker { position: relative; }
.lang-btn {
    height: 36px; padding: 0 12px; border-radius: 10px;
    border: 1px solid var(--c-border); background: var(--c-surface);
    color: var(--c-text-2); cursor: pointer;
    display: flex; align-items: center; gap: 6px;
    font-size: 12px; font-weight: 500; font-family: inherit;
    transition: all 0.2s; white-space: nowrap;
}
.lang-btn:hover { color: var(--c-text); }
.lang-dropdown {
    position: absolute; top: calc(100% + 8px); right: 0;
    background: var(--c-nav-bg); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--c-border); border-radius: var(--radius-sm);
    padding: 4px; min-width: 120px; box-shadow: var(--c-shadow-lg);
    display: none; z-index: 200; list-style: none; margin: 0;
}
.lang-picker:hover .lang-dropdown, .lang-dropdown:hover { display: block; }
.lang-option {
    display: block; padding: 8px 12px; border-radius: 8px; font-size: 13px;
    color: var(--c-text-2); text-decoration: none; transition: all 0.15s;
}
.lang-option:hover { background: var(--c-tag-bg); color: var(--c-text); }
.lang-option.current { color: var(--c-text); font-weight: 500; }

/* ============================================
   HERO BANNER
   ============================================ */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    text-align: center; padding: 120px 24px 80px; position: relative; z-index: 1;
}
.hero-inner { max-width: 800px; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px;
    border-radius: 999px; border: 1px solid var(--c-border); background: var(--c-surface);
    backdrop-filter: blur(12px); font-size: 12px; font-weight: 500; color: var(--c-text-2);
    margin-bottom: 32px; opacity: 0; transform: translateY(20px);
    animation: fadeUp 0.8s 0.1s forwards;
}
.hero-badge-dot { width: 6px; height: 6px; border-radius: 50%; background: #22c55e; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero-title {
    font-family: 'Syne', sans-serif; font-size: clamp(48px, 8vw, 96px); font-weight: 800;
    letter-spacing: -3px; line-height: 0.95; color: var(--c-text); margin: 0 0 24px;
    opacity: 0; transform: translateY(30px); animation: fadeUp 0.9s 0.2s forwards;
}
.hero-tagline {
    font-size: clamp(16px, 2.5vw, 20px); color: var(--c-text-2); font-weight: 400;
    margin-bottom: 48px; line-height: 1.6; opacity: 0; transform: translateY(20px);
    animation: fadeUp 0.8s 0.35s forwards;
}
.hero-cta {
    display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px;
    background: var(--c-text); color: var(--c-bg); border-radius: 12px;
    font-size: 14px; font-weight: 600; text-decoration: none; transition: all var(--transition);
    opacity: 0; transform: translateY(20px); animation: fadeUp 0.8s 0.5s forwards;
}
.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 40px var(--c-glow); opacity: 0.9; }
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }

.scroll-indicator {
    position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: var(--c-text-2); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
    opacity: 0; animation: fadeUp 0.8s 1s forwards;
}
.scroll-line {
    width: 1px; height: 40px;
    background: linear-gradient(to bottom, var(--c-text-2), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
    0%  { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100%{ transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content { position: relative; z-index: 1; max-width: 1280px; margin: 0 auto; padding: 0 24px 120px; }

/* FILTER + SEARCH BAR */
.controls { display: flex; align-items: center; gap: 12px; margin-bottom: 48px; flex-wrap: wrap; }
.filter-tabs {
    display: flex; align-items: center; gap: 4px; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: 12px; padding: 4px; backdrop-filter: blur(12px);
}
.filter-tab {
    padding: 7px 16px; border-radius: 9px; font-size: 13px; font-weight: 500;
    color: var(--c-text-2); cursor: pointer; border: none; background: none;
    font-family: inherit; transition: all 0.2s; white-space: nowrap;
}
.filter-tab:hover { color: var(--c-text); background: var(--c-tag-bg); }
.filter-tab.active { background: var(--c-text); color: var(--c-bg); }
.search-wrap { flex: 1; min-width: 200px; position: relative; }
.search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--c-text-2); pointer-events: none; }
.search-input {
    width: 100%; height: 40px; padding: 0 16px 0 42px; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: 12px; font-size: 13px;
    color: var(--c-text); font-family: inherit; backdrop-filter: blur(12px);
    transition: all 0.2s; outline: none;
}
.search-input::placeholder { color: var(--c-text-2); }
.search-input:focus { border-color: rgba(0,0,0,0.2); box-shadow: 0 0 0 3px var(--c-glow); }
.dark .search-input:focus { border-color: rgba(255,255,255,0.15); }

/* PROJECT GRID */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.project-card { opacity: 0; transform: translateY(32px); transition: opacity 0.6s ease, transform 0.6s ease; }
.project-card.visible { opacity: 1; transform: translateY(0); }

.card-inner {
    background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius);
    overflow: hidden; cursor: pointer; position: relative;
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: var(--c-shadow); transform-style: preserve-3d; will-change: transform;
}
.card-inner::before {
    content: ''; position: absolute; inset: 0; border-radius: inherit;
    background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 60%);
    opacity: 0; transition: opacity var(--transition); pointer-events: none; z-index: 1;
}
.card-inner:hover { transform: scale(1.025) translateY(-4px); box-shadow: var(--c-shadow-lg); }
.card-inner:hover::before { opacity: 1; }
.card-inner::after {
    content: ''; position: absolute; inset: 0; border-radius: inherit;
    border: 1px solid transparent;
    background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out; mask-composite: exclude;
    opacity: 0; transition: opacity var(--transition); pointer-events: none;
}
.card-inner:hover::after { opacity: 1; }

.card-cover {
    width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block;
    background: var(--c-bg-2); position: relative; overflow: hidden;
}
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card-inner:hover .card-cover img { transform: scale(1.04); }
.card-cover-placeholder {
    width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--c-bg-2) 0%, var(--c-bg) 100%); color: var(--c-text-2);
}
.card-featured-badge {
    position: absolute; top: 12px; left: 12px; z-index: 2; padding: 4px 10px;
    background: rgba(0,0,0,0.7); backdrop-filter: blur(8px); color: #fff;
    border-radius: 999px; font-size: 10px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase;
}
.dark .card-featured-badge { background: rgba(255,255,255,0.15); }
.card-body { padding: 20px; position: relative; z-index: 1; }
.card-category {
    display: inline-block; padding: 3px 10px; background: var(--c-tag-bg); color: var(--c-tag-text);
    border-radius: 6px; font-size: 11px; font-weight: 600; letter-spacing: 0.04em;
    text-transform: uppercase; margin-bottom: 10px;
}
.card-title {
    font-family: 'Syne', sans-serif; font-size: 17px; font-weight: 700; color: var(--c-text);
    margin: 0 0 8px; line-height: 1.3; letter-spacing: -0.3px;
}
.card-desc {
    font-size: 13px; color: var(--c-text-2); line-height: 1.6; margin: 0;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card-footer { padding: 12px 20px; border-top: 1px solid var(--c-border); display: flex; align-items: center; justify-content: space-between; }
.card-tech { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
.tech-tag {
    padding: 2px 8px; background: var(--c-tag-bg); color: var(--c-tag-text); border-radius: 4px;
    font-size: 10px; font-family: 'JetBrains Mono', monospace; font-weight: 500;
}
.card-arrow {
    width: 28px; height: 28px; border-radius: 8px; background: var(--c-text); color: var(--c-bg);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all 0.2s;
}
.card-inner:hover .card-arrow { background: var(--c-accent); }
.empty-state { grid-column: 1/-1; text-align: center; padding: 80px 24px; color: var(--c-text-2); }

/* ============================================
   PROJECT MODAL
   ============================================ */
.modal-overlay {
    position: fixed; inset: 0; z-index: 500; background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center; padding: 24px;
    opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
    background: var(--c-bg); border: 1px solid var(--c-border); border-radius: 24px;
    max-width: 800px; width: 100%; max-height: 90vh; overflow-y: auto;
    box-shadow: 0 32px 80px rgba(0,0,0,0.3);
    transform: scale(0.95) translateY(20px); transition: transform 0.35s cubic-bezier(0.23,1,0.32,1);
    scrollbar-width: thin; scrollbar-color: var(--c-border) transparent;
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }
.modal-cover { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 20px 20px 0 0; background: var(--c-bg-2); display: block; }
.modal-cover img { width: 100%; height: 100%; object-fit: cover; border-radius: 20px 20px 0 0; }
.modal-body { padding: 32px; }
.modal-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.modal-title { font-family: 'Syne', sans-serif; font-size: 28px; font-weight: 800; color: var(--c-text); letter-spacing: -0.5px; line-height: 1.2; margin: 0; }
.modal-close {
    width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--c-border);
    background: var(--c-surface); color: var(--c-text-2); cursor: pointer;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all 0.2s;
}
.modal-close:hover { color: var(--c-text); }
.modal-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.modal-content { color: var(--c-text); line-height: 1.75; font-size: 15px; }
.modal-content h1, .modal-content h2, .modal-content h3 { font-family: 'Syne', sans-serif; font-weight: 700; margin: 28px 0 12px; color: var(--c-text); }
.modal-content h2 { font-size: 20px; }
.modal-content h3 { font-size: 17px; }
.modal-content p { margin-bottom: 16px; }
.modal-content a { color: var(--c-text); text-decoration: underline; }
.modal-content img { max-width: 100%; height: auto; border-radius: 8px; }
.modal-content blockquote {
    border-left: 3px solid var(--c-border); padding: 12px 20px; margin: 16px 0;
    color: var(--c-text-2); background: var(--c-surface-2); border-radius: 0 8px 8px 0;
}
.modal-content pre, .modal-content pre.ql-syntax {
    background: #1a1a1e !important; border-radius: 12px; padding: 20px; overflow-x: auto;
    margin: 16px 0; font-size: 13px; line-height: 1.7; color: #d4d4d4 !important;
    font-family: 'JetBrains Mono', monospace !important; border: none !important;
}
.modal-content pre code, .modal-content pre.ql-syntax code {
    background: none !important; color: inherit !important; padding: 0 !important;
    border-radius: 0 !important; font-size: inherit !important; font-family: inherit !important;
}
.modal-content code:not(pre code):not(.ql-syntax code) {
    background: var(--c-tag-bg); padding: 2px 6px; border-radius: 4px;
    font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--c-text);
}
.modal-actions { margin-top: 32px; display: flex; gap: 12px; }
.btn-primary {
    display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px;
    background: var(--c-text); color: var(--c-bg); border-radius: 10px;
    font-size: 13px; font-weight: 600; text-decoration: none; transition: all 0.2s;
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-secondary {
    display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px;
    background: var(--c-surface); color: var(--c-text); border: 1px solid var(--c-border);
    border-radius: 10px; font-size: 13px; font-weight: 500; text-decoration: none;
    cursor: pointer; font-family: inherit; transition: all 0.2s;
}
.btn-secondary:hover { background: var(--c-tag-bg); }

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-section { position: relative; z-index: 1; padding: 80px 24px 120px; }
.about-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-label { font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c-text-2); margin-bottom: 16px; }
.about-title { font-family: 'Syne', sans-serif; font-size: clamp(32px, 5vw, 56px); font-weight: 800; letter-spacing: -2px; line-height: 1.05; color: var(--c-text); margin: 0 0 24px; }
.about-desc { font-size: 16px; color: var(--c-text-2); line-height: 1.75; }
.about-social { margin-top: 32px; display: flex; align-items: center; gap: 20px; }
.about-social .social-icon img { height: 20px; opacity: 0.7; transition: opacity 0.2s; }
.about-social .social-icon:hover img { opacity: 1; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: 16px; padding: 24px; backdrop-filter: blur(12px); }
.stat-number { font-family: 'Syne', sans-serif; font-size: 40px; font-weight: 800; letter-spacing: -2px; color: var(--c-text); line-height: 1; margin-bottom: 6px; }
.stat-label { font-size: 12px; color: var(--c-text-2); font-weight: 500; }

/* ============================================
   FOOTER
   ============================================ */
.footer {
    position: relative; z-index: 1; border-top: 1px solid var(--c-border);
    padding: 32px 24px; color: var(--c-text-2); font-size: 13px;
}
.footer-inner { max-width: 1280px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.footer-links { display: flex; align-items: center; gap: 16px; }
.footer-links a { text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--c-text); }
.footer-sep { color: var(--c-border); }
.footer-logo img { height: 20px; opacity: 0.8; transition: opacity 0.3s; }
.footer-logo img:hover { opacity: 1; }

/* UTILITY */
.hidden { display: none !important; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 999px; }

@media (min-width: 769px) {
    .footer-inner { flex-direction: row; justify-content: space-between; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .about-inner { grid-template-columns: 1fr; gap: 48px; }
    .hero-title { letter-spacing: -2px; }
    .projects-grid { grid-template-columns: 1fr; }
    .controls { flex-direction: column; align-items: stretch; }
    .filter-tabs { overflow-x: auto; flex-wrap: nowrap; }
}

/* Generic single/archive fallback (index.php, single-project.php) */
.basic-wrap { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; padding: 120px 24px 120px; }
.basic-wrap h1 { font-family: 'Syne', sans-serif; letter-spacing: -1px; }
.basic-post { padding: 24px 0; border-bottom: 1px solid var(--c-border); }
.basic-post a { text-decoration: none; }