/* ============================================
   Adstrra - Premium Design System
   ============================================ */

/* === CSS Variables === */
:root {
    --primary: #6c5ce7;
    --primary-hover: #5a4bd1;
    --primary-light: #f0edff;
    --primary-dark: #4834d4;
    --accent: #00cec9;
    --accent-hover: #00b5b0;
    --gradient-1: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    --gradient-2: linear-gradient(135deg, #6c5ce7 0%, #00cec9 100%);
    --gradient-3: linear-gradient(135deg, #a29bfe 0%, #fd79a8 100%);
    --gradient-hero: linear-gradient(160deg, #0c0c1d 0%, #1a1040 40%, #2d1b69 100%);
    --gradient-card: linear-gradient(135deg, rgba(255,255,255,.9) 0%, rgba(255,255,255,.6) 100%);
    --success: #00b894;
    --danger: #ff6b6b;
    --warning: #fdcb6e;
    --info: #74b9ff;
    --bg: #fafbff;
    --bg-2: #f1f3f8;
    --bg-3: #e8ecf4;
    --text: #1a1a2e;
    --text-2: #4a4a6a;
    --text-3: #8b8ba3;
    --text-primary: #1a1a2e;
    --text-muted: #8b8ba3;
    --border: #e4e7f1;
    --border-color: #e4e7f1;
    --card-bg: #ffffff;
    --surface-2: #f1f3f8;
    --shadow-1: 0 2px 8px rgba(108,92,231,.06);
    --shadow-2: 0 8px 30px rgba(108,92,231,.1);
    --shadow-3: 0 20px 60px rgba(108,92,231,.15);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --header-h: 72px;
    --transition: all .3s cubic-bezier(.4,0,.2,1);
}

[data-bs-theme="dark"] {
    --bg: #0c0c1d;
    --bg-2: #151530;
    --bg-3: #1e1e42;
    --text: #e8e8f0;
    --text-2: #b0b0cc;
    --text-3: #6b6b8a;
    --text-primary: #e8e8f0;
    --text-muted: #6b6b8a;
    --border: #2a2a4a;
    --border-color: #2a2a4a;
    --card-bg: #18183a;
    --surface-2: #151530;
    --primary-light: #1e1b4b;
    --shadow-1: 0 2px 8px rgba(0,0,0,.2);
    --shadow-2: 0 8px 30px rgba(0,0,0,.3);
    --shadow-3: 0 20px 60px rgba(0,0,0,.35);
    --gradient-card: linear-gradient(135deg, rgba(24,24,58,.9) 0%, rgba(24,24,58,.6) 100%);
}

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden;transition:var(--transition)}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-hover)}
img{max-width:100%;height:auto}
::selection{background:var(--primary);color:#fff}

/* === Scrollbar === */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg-2)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text-3)}

/* === Reading Progress === */
.reading-progress{position:fixed;top:0;left:0;width:0;height:3px;background:var(--gradient-2);z-index:9999;transition:width .1s linear;border-radius:0 3px 3px 0}

/* ============================================
   HEADER
   ============================================ */
.site-header{background:rgba(250,251,255,.85);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--border);z-index:1030;transition:var(--transition)}
[data-bs-theme="dark"] .site-header{background:rgba(12,12,29,.9)}
.site-header.scrolled{box-shadow:var(--shadow-2)}
.navbar{padding:0;height:var(--header-h)}
.navbar-brand{display:flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:1.5rem;font-weight:800;letter-spacing:-.02em}
.brand-text{background:var(--gradient-1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.navbar .nav-link{font-weight:500;font-size:.88rem;color:var(--text-2);padding:.5rem .9rem !important;border-radius:var(--radius-xs);transition:var(--transition)}
.navbar .nav-link:hover,.navbar .nav-link.active{color:var(--primary);background:var(--primary-light)}
.navbar-toggler{border:1px solid var(--border);padding:.35rem .55rem;border-radius:var(--radius-xs)}

/* Search */
.search-box{position:relative}
.search-box .form-control{width:200px;padding-left:2.2rem;border-radius:var(--radius-full);border:1.5px solid var(--border);background:var(--bg-2);font-size:.85rem;height:38px;transition:var(--transition)}
.search-box .form-control:focus{width:280px;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--card-bg)}
.search-box .btn{position:absolute;right:3px;top:50%;transform:translateY(-50%);border-radius:50%;width:30px;height:30px;display:flex;align-items:center;justify-content:center;padding:0;color:var(--text-3);border:none;background:transparent}
.search-suggestions{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-3);z-index:1050;max-height:400px;overflow-y:auto;animation:fadeSlideDown .25s ease}
@keyframes fadeSlideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
.search-suggestion-item{display:block;padding:.7rem 1rem;border-bottom:1px solid var(--border);color:var(--text);font-size:.9rem;transition:var(--transition);text-decoration:none}
.search-suggestion-item:last-child{border-bottom:0}
.search-suggestion-item:hover{background:var(--primary-light);color:var(--primary)}

/* Theme Toggle */
.theme-toggle{width:38px;height:38px;border-radius:50%;border:1.5px solid var(--border);background:var(--card-bg);color:var(--text-2);display:flex;align-items:center;justify-content:center;transition:var(--transition);cursor:pointer;font-size:1rem}
.theme-toggle:hover{border-color:var(--primary);color:var(--primary);transform:rotate(30deg)}

/* ============================================
   HERO
   ============================================ */
.hero-section{background:var(--gradient-hero);position:relative;overflow:hidden;padding:5rem 0 4rem}
.hero-section::before{content:'';position:absolute;top:-30%;right:-15%;width:700px;height:700px;background:radial-gradient(circle,rgba(108,92,231,.2) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.hero-section::after{content:'';position:absolute;bottom:-20%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(0,206,201,.12) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.hero-section h1{font-family:var(--font-display);font-size:3.5rem;font-weight:800;line-height:1.1;letter-spacing:-.03em;color:#fff}
.hero-section .lead{font-size:1.15rem;color:rgba(255,255,255,.7);max-width:540px;line-height:1.8}

/* Hero animated shapes */
.hero-bg-shapes{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-bg-shapes .shape{position:absolute;border-radius:50%;animation:heroFloat 20s ease-in-out infinite}
.shape-1{width:300px;height:300px;background:radial-gradient(circle,rgba(108,92,231,.15) 0%,transparent 70%);top:-50px;right:10%;animation-delay:0s}
.shape-2{width:200px;height:200px;background:radial-gradient(circle,rgba(0,206,201,.12) 0%,transparent 70%);bottom:10%;left:5%;animation-delay:-7s}
.shape-3{width:150px;height:150px;background:radial-gradient(circle,rgba(162,155,254,.1) 0%,transparent 70%);top:40%;right:25%;animation-delay:-14s}
@keyframes heroFloat{0%,100%{transform:translate(0,0) scale(1)}25%{transform:translate(30px,-20px) scale(1.05)}50%{transform:translate(-20px,30px) scale(.95)}75%{transform:translate(15px,15px) scale(1.02)}}

.hero-search{max-width:520px}
.hero-search .form-control{border-radius:var(--radius-full);padding:.9rem 1.5rem;padding-left:3rem;border:2px solid rgba(255,255,255,.15);background:rgba(255,255,255,.08);color:#fff;font-size:1rem;height:54px;backdrop-filter:blur(10px)}
.hero-search .form-control::placeholder{color:rgba(255,255,255,.5)}
.hero-search .form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(108,92,231,.3);background:rgba(255,255,255,.12)}
.hero-search .btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);border-radius:50%;width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:var(--gradient-1);color:#fff;border:none}
.hero-features{display:flex;gap:2rem;flex-wrap:wrap;margin-top:2.5rem}
.hero-features .feature-item{display:flex;align-items:center;gap:.5rem;color:rgba(255,255,255,.7);font-size:.85rem;font-weight:500}
.hero-features .feature-item i{color:var(--accent);font-size:1rem}

/* ============================================
   BUTTONS
   ============================================ */
.btn{font-weight:600;border-radius:var(--radius-sm);padding:.6rem 1.4rem;transition:var(--transition);font-size:.88rem}
.btn-primary{background:var(--primary);border-color:var(--primary);box-shadow:0 2px 10px rgba(108,92,231,.25)}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 20px rgba(108,92,231,.35)}
.btn-outline-primary{color:var(--primary);border-color:var(--primary)}
.btn-outline-primary:hover{background:var(--primary);border-color:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-lg{padding:.8rem 2rem;font-size:.95rem;border-radius:var(--radius-full)}

.btn-gradient{background:var(--gradient-1);color:#fff;border:none;box-shadow:0 4px 20px rgba(108,92,231,.35);transition:var(--transition)}
.btn-gradient:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(108,92,231,.5);color:#fff}

.btn-glass{background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.2);backdrop-filter:blur(10px);transition:var(--transition)}
.btn-glass:hover{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.4);color:#fff;transform:translateY(-3px)}

/* ============================================
   BADGES
   ============================================ */
.bg-primary-soft{background:var(--primary-light) !important;color:var(--primary) !important}
.bg-gradient-primary{background:var(--gradient-1) !important;color:#fff !important}
.badge{font-weight:600;font-size:.72rem;letter-spacing:.03em}

/* ============================================
   CARDS
   ============================================ */
.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);transition:var(--transition)}
.card-article{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--card-bg);transition:var(--transition);position:relative}
.card-article:hover{transform:translateY(-6px);box-shadow:var(--shadow-3);border-color:transparent}
.card-article .card-img-top{transition:transform .6s cubic-bezier(.4,0,.2,1)}
.card-article:hover .card-img-top{transform:scale(1.06)}
.card-title-hover{transition:var(--transition)}
.card-title-hover:hover{color:var(--primary)}

/* ============================================
   CATEGORY SECTION
   ============================================ */
.categories-section{padding:2rem 0 0}
.category-card{display:flex;flex-direction:column;align-items:center;gap:.5rem;border:1.5px solid var(--border);border-radius:var(--radius);transition:var(--transition);position:relative;overflow:hidden;text-align:center;padding:1.5rem 1rem;background:var(--card-bg);text-decoration:none;color:var(--text)}
.category-card:hover{border-color:var(--primary);transform:translateY(-5px);box-shadow:var(--shadow-2);color:var(--primary)}
.category-icon{width:56px;height:56px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;margin:0 auto;font-size:1.5rem;background:var(--primary-light);color:var(--primary);transition:var(--transition)}
.category-card:hover .category-icon{background:var(--primary);color:#fff;transform:scale(1.1)}

/* ============================================
   ARTICLE CONTENT
   ============================================ */
.article-content{font-size:1.1rem;line-height:1.9}
.article-content h2,.article-content h3,.article-content h4{font-family:var(--font-display);font-weight:700;margin-top:2.5rem;margin-bottom:1rem;letter-spacing:-.02em}
.article-content h2{font-size:1.7rem}
.article-content h3{font-size:1.35rem}
.article-content p{margin-bottom:1.5rem;color:var(--text-2)}
.article-content img{border-radius:var(--radius);margin:2rem 0;box-shadow:var(--shadow-1)}
.article-content pre{background:var(--bg-2);padding:1.25rem;border-radius:var(--radius-sm);overflow-x:auto;border:1px solid var(--border);margin:1.5rem 0}
.article-content code{background:var(--primary-light);padding:.15rem .45rem;border-radius:var(--radius-xs);font-size:.88em;color:var(--primary)}
.article-content pre code{background:none;padding:0;color:inherit}
.article-content blockquote{border-left:4px solid var(--primary);padding:1rem 1.5rem;margin:2rem 0;background:var(--primary-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-2)}
.article-content ul,.article-content ol{padding-left:1.5rem;margin-bottom:1.5rem}
.article-content li{margin-bottom:.5rem;color:var(--text-2)}

/* Table of Contents */
.toc-card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;position:sticky;top:calc(var(--header-h) + 1rem)}
.toc-card h6{font-family:var(--font-display);font-weight:700;margin-bottom:.75rem;color:var(--text)}
.toc-card .toc-link{display:block;padding:.35rem 0;color:var(--text-2);font-size:.85rem;text-decoration:none;transition:var(--transition);border-left:2px solid transparent;padding-left:.75rem}
.toc-card .toc-link:hover,.toc-card .toc-link.active{color:var(--primary);border-left-color:var(--primary)}

/* ============================================
   TRENDING
   ============================================ */
.trending-number{font-family:var(--font-display);font-weight:800;font-size:2rem;background:var(--gradient-1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;min-width:3.5rem;line-height:1}

/* ============================================
   SECTION HEADER
   ============================================ */
.section-header{margin-bottom:2rem}
.section-header h2{font-family:var(--font-display);letter-spacing:-.02em}

/* ============================================
   NEWSLETTER
   ============================================ */
.newsletter-form{display:flex;gap:.75rem;flex-wrap:wrap}
.newsletter-form .form-control{flex:1;min-width:200px;border-radius:var(--radius-full);padding:.85rem 1.5rem;border:2px solid var(--border);background:var(--card-bg);font-size:.95rem;transition:var(--transition)}
.newsletter-form .form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.newsletter-box{background:var(--gradient-1);border-radius:var(--radius);padding:3rem;position:relative;overflow:hidden;color:#fff}
.newsletter-box::before{content:'';position:absolute;top:-50%;right:-20%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);border-radius:50%}

/* ============================================
   SHARE BUTTONS
   ============================================ */
.share-buttons .btn{border-radius:var(--radius-full);width:40px;height:40px;display:flex;align-items:center;justify-content:center;padding:0;transition:var(--transition)}
.share-buttons .btn:hover{transform:translateY(-3px)}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top{position:fixed;bottom:2rem;right:2rem;z-index:1040;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--gradient-1);color:#fff;border:none;box-shadow:0 4px 20px rgba(108,92,231,.4);transition:var(--transition);cursor:pointer;opacity:0;transform:translateY(20px)}
.back-to-top.show{opacity:1;transform:translateY(0)}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(108,92,231,.5);color:#fff}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb{background:none;padding:0;margin:0;font-size:.85rem}
.breadcrumb-item a{color:var(--text-3);transition:var(--transition)}
.breadcrumb-item a:hover{color:var(--primary)}
.breadcrumb-item.active{color:var(--text-2)}

/* ============================================
   PAGINATION
   ============================================ */
.pagination .page-link{color:var(--text-2);border:1.5px solid var(--border);border-radius:var(--radius-sm);margin:0 3px;font-weight:500;font-size:.88rem;transition:var(--transition)}
.pagination .page-link:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.pagination .page-item.active .page-link{background:var(--gradient-1);border-color:var(--primary);color:#fff;box-shadow:0 2px 10px rgba(108,92,231,.3)}

/* ============================================
   FOOTER
   ============================================ */
.site-footer{background:var(--gradient-hero);color:#94a3b8;position:relative;overflow:hidden}
.site-footer::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--gradient-2)}
.site-footer h5,.site-footer h6{color:#f1f5f9;font-family:var(--font-display);font-weight:700}
.site-footer a{color:#94a3b8;transition:var(--transition)}
.site-footer a:hover{color:#fff}
.footer-links{list-style:none;padding:0}
.footer-links li{margin-bottom:.5rem}
.footer-links li a{transition:var(--transition);display:inline-block;font-size:.9rem}
.footer-links li a:hover{transform:translateX(4px);color:#fff}
.social-links{display:flex;gap:.5rem}
.social-links a,.social-links .btn{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:1.5px solid rgba(255,255,255,.12);color:#94a3b8;background:rgba(255,255,255,.04);transition:var(--transition);text-decoration:none}
.social-links a:hover,.social-links .btn:hover{border-color:var(--primary);color:#fff;background:rgba(108,92,231,.2);transform:translateY(-3px)}

/* ============================================
   ADS
   ============================================ */
.ad-wrapper{margin:1.5rem 0;text-align:center;border-radius:var(--radius-sm);overflow:hidden}
.ad-label{font-size:.6rem;color:var(--text-3);text-transform:uppercase;letter-spacing:.1em;margin-bottom:.25rem;font-weight:600}
.ad-in-content{margin:2.5rem 0;padding:1.5rem;background:var(--bg-2);border-radius:var(--radius);border:1px dashed var(--border);text-align:center}
.sticky-sidebar .ad-wrapper{margin-top:1rem}
.ad-sticky_mobile{position:fixed;bottom:0;left:0;right:0;z-index:1020;background:var(--card-bg);border-top:1px solid var(--border);padding:.5rem;text-align:center;box-shadow:0 -4px 20px rgba(0,0,0,.08);display:none}
@media(max-width:768px){.ad-sticky_mobile{display:block}body{padding-bottom:70px}}

/* ============================================
   FAQ
   ============================================ */
.accordion-item{border:1px solid var(--border);border-radius:var(--radius) !important;margin-bottom:.75rem;overflow:hidden}
.accordion-button{font-weight:600;font-size:.95rem;color:var(--text);padding:1rem 1.25rem;border-radius:var(--radius) !important}
.accordion-button:not(.collapsed){background:var(--primary-light);color:var(--primary);box-shadow:none}
.accordion-button:focus{box-shadow:0 0 0 3px var(--primary-light)}

/* ============================================
   SEARCH RESULTS
   ============================================ */
.search-result{transition:var(--transition);padding:1.25rem 0}
.search-result:hover{background:var(--bg-2);border-radius:var(--radius-sm)}

/* ============================================
   FORMS
   ============================================ */
.form-control,.form-select{border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:.65rem 1rem;transition:var(--transition);background:var(--card-bg);color:var(--text);font-size:.9rem}
.form-control:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--card-bg);color:var(--text)}
.form-control::placeholder{color:var(--text-3)}

/* ============================================
   SITE MAIN
   ============================================ */
.site-main{min-height:60vh}

/* ============================================
   FLASH MESSAGES
   ============================================ */
.alert{border-radius:var(--radius-sm);font-weight:500;font-size:.9rem}

/* ============================================
   TAG BADGES
   ============================================ */
.tag-badge{display:inline-block;padding:.25rem .65rem;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;border:1px solid var(--border);color:var(--text-2);transition:var(--transition);text-decoration:none}
.tag-badge:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}

/* ============================================
   ARTICLE META
   ============================================ */
.article-meta{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;font-size:.85rem;color:var(--text-3)}
.article-meta i{margin-right:.25rem}

/* ============================================
   TABLE OF CONTENTS - SIDEBAR
   ============================================ */
.sidebar-widget{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.5rem}
.sidebar-widget h6{font-family:var(--font-display);font-weight:700;margin-bottom:1rem;color:var(--text)}

/* ============================================
   ANIMATIONS
   ============================================ */
.site-main{animation:fadeUp .5s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.fade-in-up{opacity:0;transform:translateY(25px);transition:opacity .6s ease,transform .6s ease}
.fade-in-up.visible{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){.fade-in-up{opacity:1;transform:none;transition:none}}
.hover-lift{transition:var(--transition)}
.hover-lift:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}

/* ============================================
   RESPONSIVE
   ============================================ */
@media(max-width:991.98px){
    .hero-section{padding:3.5rem 0}
    .hero-section h1{font-size:2.4rem}
    .search-box .form-control{width:170px}
    .search-box .form-control:focus{width:220px}
}
@media(max-width:767.98px){
    .hero-section{padding:3rem 0}
    .hero-section h1{font-size:2rem}
    .hero-section .lead{font-size:1rem}
    .article-content{font-size:1rem}
    .trending-number{font-size:1.5rem;min-width:2.5rem}
}
@media(max-width:575.98px){
    .hero-section h1{font-size:1.7rem}
    .newsletter-form{flex-direction:column}
    .newsletter-form .btn{width:100%}
}