/*
Theme Name: NexaHub
Theme URI: https://example.com/nexahub
Author: Custom Build
Author URI: https://example.com
Description: Light, modern multi-purpose WordPress theme for an AI Tools, Daily Utility Tools, Learning Center, Blog/News and Web Stories platform. Purple/violet accent on a clean white canvas.
Version: 1.3.0
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: nexahub
*/

/* ==========================================================================
   0. DESIGN TOKENS  — light, airy, purple-accented
   ========================================================================== */
:root{
  --bg:            #FAFAFE;
  --bg-alt:        #F3F1FC;
  --surface:       #FFFFFF;
  --surface-2:     #F6F4FD;
  --border:        #E7E3F7;
  --border-soft:   #EFECFA;

  --purple:        #6C4DFF;
  --purple-dim:    #5636E0;
  --purple-light:  #EFE9FF;
  --purple-border: #E1D8FF;
  --purple-glow:   rgba(108,77,255,0.18);
  --cyan:          #17B7A3;
  --cyan-light:    #E4F9F5;
  --cyan-glow:     rgba(23,183,163,0.16);
  --amber:         #FF9F45;

  --text:          #17142B;
  --text-muted:    #625D7A;
  --text-faint:    #948FAE;

  --grad-primary:  linear-gradient(135deg, var(--purple) 0%, #9B7BFF 55%, var(--cyan) 100%);
  --grad-card:     linear-gradient(160deg, rgba(108,77,255,0.08) 0%, rgba(23,183,163,0.05) 100%);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 26px;
  --radius-pill: 999px;

  --shadow-soft: 0 1px 2px rgba(23,20,43,0.04), 0 12px 28px -14px rgba(23,20,43,0.10);
  --shadow-glow: 0 1px 2px rgba(23,20,43,0.04), 0 20px 44px -14px rgba(108,77,255,0.28);
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(900px 480px at 14% -8%, var(--purple-glow), transparent 60%),
    radial-gradient(760px 420px at 100% 0%, var(--cyan-glow), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;margin:0 0 .5em;letter-spacing:-0.01em;color:var(--text);}
h1{font-size:clamp(2.2rem,4.5vw,3.6rem);}
h2{font-size:clamp(1.7rem,3vw,2.4rem);}
h3{font-size:1.25rem;}
p{margin:0 0 1em;color:var(--text-muted);}
:focus-visible{outline:2px solid var(--purple);outline-offset:3px;}
.container{max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--purple-dim);background:var(--purple-light);border:1px solid var(--purple-border);
  padding:6px 14px;border-radius:var(--radius-pill);margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--purple);}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);font-weight:600;font-size:.95rem;
  padding:14px 26px;border-radius:var(--radius-pill);border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn-primary{background:var(--grad-primary);color:#fff;box-shadow:0 10px 26px -8px var(--purple-glow);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px -8px rgba(108,77,255,0.38);}
.btn-outline{border-color:var(--border);color:var(--text);background:var(--surface);}
.btn-outline:hover{border-color:var(--purple);color:var(--purple-dim);}

.neural-grid{
  position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:0;
  background-image:
    linear-gradient(rgba(108,77,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108,77,255,0.06) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(250,250,254,0.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border-soft);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px;}
.site-branding{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--text);}
.site-branding .logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--grad-primary);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;
}
.site-branding small{display:block;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.12em;color:var(--text-faint);font-weight:500;text-transform:uppercase;}
.primary-menu{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.primary-menu li a{
  display:block;padding:9px 16px;border-radius:var(--radius-pill);font-size:.92rem;color:var(--text-muted);
  transition:color .15s, background .15s;
}
.primary-menu li a:hover, .primary-menu li.current-menu-item a{color:var(--purple-dim);background:var(--purple-light);}
.header-actions{display:flex;align-items:center;gap:12px;}
.menu-toggle{display:none;background:var(--surface);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:8px 10px;}

@media (max-width:960px){
  .primary-menu{
    position:fixed;inset:76px 0 0 0;background:var(--surface);flex-direction:column;align-items:stretch;padding:20px;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:all .2s ease;overflow:auto;
  }
  .primary-menu.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .primary-menu li a{padding:14px 18px;font-size:1.05rem;}
  .menu-toggle{display:block;}
}

.hero{position:relative;padding:100px 0 70px;overflow:hidden;}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.hero-copy p.lead{font-size:1.08rem;max-width:520px;}
.hero-actions{display:flex;gap:14px;margin:28px 0 34px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;}
.hero-stats .stat b{display:block;font-family:var(--font-display);font-size:1.5rem;color:var(--text);}
.hero-stats .stat span{font-size:.8rem;color:var(--text-faint);}

.hero-visual{position:relative;aspect-ratio:1/1;border-radius:var(--radius-lg);background:var(--grad-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:var(--shadow-soft);}
.hero-visual .float-card{
  position:absolute;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:16px 18px;box-shadow:var(--shadow-glow);font-family:var(--font-mono);font-size:.75rem;color:var(--text-muted);
}
.hero-visual .float-card b{display:block;font-family:var(--font-display);font-size:1rem;color:var(--text);margin-bottom:2px;}
.hero-visual .card-1{top:10%;left:8%;width:150px;}
.hero-visual .card-2{bottom:12%;right:8%;width:160px;}
.hero-visual .orb{position:relative;z-index:1;width:56%;aspect-ratio:1/1;border-radius:50%;background:radial-gradient(circle at 35% 30%, #C9B8FF, var(--purple) 55%, var(--purple-dim) 100%);box-shadow:0 30px 70px -20px var(--purple-glow);}
@media (max-width:900px){.hero .container{grid-template-columns:1fr;}.hero-visual{order:-1;max-width:340px;margin:0 auto;}}

.stories-bar{padding:36px 0;border-bottom:1px solid var(--border-soft);border-top:1px solid var(--border-soft);background:var(--surface);}
.stories-track{display:flex;gap:20px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin;}
.story-item{flex:0 0 auto;width:96px;text-align:center;}
.story-ring{width:88px;height:88px;border-radius:50%;padding:3px;background:var(--grad-primary);margin:0 auto 8px;}
.story-ring img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:3px solid var(--surface);}
.story-item span{font-size:.76rem;color:var(--text-muted);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:40px;flex-wrap:wrap;}
.section-head h2 span{color:var(--purple);}
.section-head .view-all{font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted);border-bottom:1px dashed var(--border);padding-bottom:2px;}
.section-head .view-all:hover{color:var(--purple-dim);border-color:var(--purple);}

.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.card-grid.cols-3{grid-template-columns:repeat(3,1fr);}
@media (max-width:1000px){.card-grid,.card-grid.cols-3{grid-template-columns:repeat(2,1fr);}}
@media (max-width:600px){.card-grid,.card-grid.cols-3{grid-template-columns:1fr;}}

.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:26px;transition:transform .18s ease, border-color .18s ease, box-shadow .18s ease;box-shadow:var(--shadow-soft);}
.tool-card:hover{transform:translateY(-4px);border-color:var(--purple);box-shadow:var(--shadow-glow);}
.tool-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--purple-light);border:1px solid var(--purple-border);margin-bottom:16px;font-size:1.3rem;}
.tool-card h3{margin-bottom:6px;font-size:1.05rem;}
.tool-card p{font-size:.88rem;margin-bottom:14px;}
.tool-card .tool-link{font-family:var(--font-mono);font-size:.76rem;color:var(--purple-dim);}

.post-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:transform .18s ease, border-color .18s ease, box-shadow .18s ease;box-shadow:var(--shadow-soft);}
.post-card:hover{transform:translateY(-4px);border-color:var(--purple);box-shadow:var(--shadow-glow);}
.post-card .thumb{aspect-ratio:16/10;background:var(--surface-2);overflow:hidden;}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;}
.post-card .body{padding:20px;}
.post-card .cat{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--purple-dim);}
.post-card h3{margin:8px 0;font-size:1.05rem;}
.post-card .meta{font-size:.78rem;color:var(--text-faint);}

.course-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-soft);transition:transform .18s ease, box-shadow .18s ease;}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-glow);}
.course-card .thumb{aspect-ratio:16/9;background:var(--grad-card);position:relative;}
.course-card .thumb .fmt{position:absolute;top:10px;left:10px;background:rgba(23,20,43,.72);backdrop-filter:blur(6px);font-family:var(--font-mono);font-size:.68rem;padding:4px 10px;border-radius:var(--radius-pill);color:#fff;text-transform:uppercase;}
.course-card .body{padding:20px;}
.course-progress{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin-top:14px;}
.course-progress > span{display:block;height:100%;background:var(--grad-primary);}

.band{background:var(--surface);border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft);padding:52px 0;}
.band .card-grid{grid-template-columns:repeat(4,1fr);}
.band .stat b{font-family:var(--font-display);font-size:2rem;background:var(--grad-primary);-webkit-background-clip:text;background-clip:text;color:transparent;}
.band .stat span{color:var(--text-faint);font-size:.85rem;}
@media (max-width:700px){.band .card-grid{grid-template-columns:repeat(2,1fr);}}

.testimonial-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:26px;box-shadow:var(--shadow-soft);}
.testimonial-card .quote-mark{font-family:var(--font-display);font-size:2.2rem;color:var(--purple);line-height:1;margin-bottom:10px;display:block;}
.testimonial-card p{color:var(--text);font-size:.96rem;}
.testimonial-person{display:flex;align-items:center;gap:12px;margin-top:16px;}
.testimonial-person img{width:42px;height:42px;border-radius:50%;object-fit:cover;}
.testimonial-person b{display:block;font-size:.88rem;color:var(--text);}
.testimonial-person span{font-size:.78rem;color:var(--text-faint);}

.cta-band{background:var(--grad-primary);border-radius:var(--radius-lg);padding:56px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;color:#fff;}
.cta-band h2, .cta-band p{color:#fff;}
.cta-band p{opacity:.9;max-width:420px;}
.cta-form{display:flex;gap:10px;flex-wrap:wrap;}
.cta-form input{padding:14px 18px;border-radius:var(--radius-pill);border:none;min-width:240px;font-family:var(--font-body);}
.cta-form button{border:none;}

.content-wrap{display:grid;grid-template-columns:2.2fr 1fr;gap:48px;padding:60px 0;}
@media (max-width:900px){.content-wrap{grid-template-columns:1fr;}}
.widget{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:22px;margin-bottom:22px;box-shadow:var(--shadow-soft);}
.widget h3{font-size:1rem;margin-bottom:14px;}
.entry-content{font-size:1.02rem;}
.entry-content h2,.entry-content h3{margin-top:1.4em;}
.entry-content img{border-radius:var(--radius-md);margin:1.2em 0;}
.entry-content pre{background:var(--surface-2);border:1px solid var(--border);padding:16px;border-radius:var(--radius-sm);overflow:auto;font-family:var(--font-mono);}
.entry-header .eyebrow{margin-bottom:14px;}
.entry-meta{font-size:.85rem;color:var(--text-faint);margin-bottom:24px;}
.pagination{display:flex;gap:8px;margin-top:40px;}
.pagination a,.pagination span{padding:8px 14px;border:1px solid var(--border);border-radius:8px;font-family:var(--font-mono);font-size:.85rem;color:var(--text-muted);background:var(--surface);}
.pagination .current{background:var(--purple);color:#fff;border-color:var(--purple);}

.tool-app{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:34px;margin:30px 0;box-shadow:var(--shadow-soft);}
.tool-app label{display:block;font-size:.82rem;color:var(--text-muted);margin-bottom:6px;font-family:var(--font-mono);}
.tool-app input, .tool-app select, .tool-app textarea{width:100%;background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:12px 14px;border-radius:var(--radius-sm);font-family:var(--font-body);margin-bottom:18px;}
.tool-app input:focus, .tool-app select:focus, .tool-app textarea:focus{border-color:var(--purple);}
.tool-result{background:var(--purple-light);border:1px dashed #D9CCFF;border-radius:var(--radius-sm);padding:20px;font-family:var(--font-mono);color:var(--text);}

.story-player{position:fixed;inset:0;background:#000;z-index:999;display:flex;align-items:center;justify-content:center;}
.story-stage{position:relative;width:min(420px,100vw);height:100vh;overflow:hidden;background:#100E1C;}
.story-progress-row{position:absolute;top:10px;left:10px;right:10px;display:flex;gap:5px;z-index:5;}
.story-progress-row .seg{flex:1;height:3px;background:rgba(255,255,255,.25);border-radius:3px;overflow:hidden;}
.story-progress-row .seg > i{display:block;height:100%;width:0;background:#fff;}
.story-progress-row .seg.done > i{width:100%;}
.story-slide{position:absolute;inset:0;display:none;}
.story-slide.active{display:block;}
.story-slide img{width:100%;height:100%;object-fit:cover;}
.story-slide .caption{position:absolute;left:0;right:0;bottom:0;padding:28px 20px 40px;background:linear-gradient(to top, rgba(0,0,0,.85), transparent);color:#fff;}
.story-nav{position:absolute;inset:0;display:flex;z-index:4;}
.story-nav span{flex:1;}
.story-close{position:absolute;top:16px;right:16px;z-index:6;color:#fff;background:rgba(0,0,0,.4);border:none;border-radius:50%;width:34px;height:34px;font-size:1.1rem;}

.site-footer{border-top:1px solid var(--border-soft);padding:60px 0 30px;background:var(--surface);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px;}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr;}}
.footer-grid h4{font-family:var(--font-display);font-size:.9rem;margin-bottom:16px;color:var(--text);}
.footer-grid ul li{margin-bottom:10px;}
.footer-grid ul li a{color:var(--text-muted);font-size:.9rem;}
.footer-grid ul li a:hover{color:var(--purple-dim);}
.footer-bottom{border-top:1px solid var(--border-soft);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.82rem;color:var(--text-faint);}

.text-center{text-align:center;}
.mt-0{margin-top:0;}
.badge{display:inline-block;font-family:var(--font-mono);font-size:.7rem;padding:4px 10px;border-radius:var(--radius-pill);border:1px solid var(--border);color:var(--text-muted);background:var(--surface);}

/* ==========================================================================
   13. HERO SLIDER (multiple slides, editable via Theme Options)
   ========================================================================== */
.hero-slides{position:relative;}
.hero-slide{display:none;position:relative;z-index:1;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.hero-slide.active{display:grid;}
.hero-dots{display:flex;gap:8px;justify-content:center;margin-top:26px;position:relative;z-index:1;}
.hero-dot{width:9px;height:9px;border-radius:50%;border:none;background:var(--border);cursor:pointer;padding:0;transition:background .15s, transform .15s;}
.hero-dot.active{background:var(--purple);transform:scale(1.25);}
@media (max-width:900px){.hero-slide{grid-template-columns:1fr;}.hero-slide .hero-visual{order:-1;max-width:340px;margin:0 auto;}}

/* ==========================================================================
   14. TICKER
   ========================================================================== */
.ticker-wrap{overflow:hidden;background:var(--purple-light);border-bottom:1px solid var(--border-soft);padding:10px 0;}
.ticker-track{display:flex;gap:60px;white-space:nowrap;width:max-content;animation-name:nexahub-ticker-scroll;animation-timing-function:linear;animation-iteration-count:infinite;}
.ticker-track a, .ticker-track span{color:var(--purple-dim);font-family:var(--font-mono);font-size:.82rem;display:inline-block;}
.ticker-track a:hover{text-decoration:underline;}
@keyframes nexahub-ticker-scroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}

/* ==========================================================================
   15. GRID COLUMN VARIANTS
   ========================================================================== */
.card-grid.cols-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:600px){.card-grid.cols-2{grid-template-columns:1fr;}}

/* ==========================================================================
   16. WEB STORY RING — shape & size variants
   ========================================================================== */
.story-ring.shape-square, .story-ring.shape-square img{border-radius:var(--radius-md);}
.story-ring.size-sm{width:64px;height:64px;}
.story-ring.size-md{width:88px;height:88px;}
.story-ring.size-lg{width:112px;height:112px;}

/* ==========================================================================
   17. CARD SIZE VARIANTS (tool / post / course cards)
   ========================================================================== */
.tool-card.size-sm{padding:16px;}
.tool-card.size-sm .tool-icon{width:38px;height:38px;font-size:1.05rem;margin-bottom:10px;}
.tool-card.size-sm h3{font-size:.92rem;}
.tool-card.size-sm p{font-size:.8rem;margin-bottom:8px;}
.tool-card.size-lg{padding:34px;}
.tool-card.size-lg .tool-icon{width:58px;height:58px;font-size:1.55rem;}
.tool-card.size-lg h3{font-size:1.2rem;}

.post-card.size-sm .thumb{aspect-ratio:16/9;}
.post-card.size-sm .body{padding:14px;}
.post-card.size-sm h3{font-size:.92rem;}
.post-card.size-lg .thumb{aspect-ratio:4/3;}
.post-card.size-lg .body{padding:26px;}
.post-card.size-lg h3{font-size:1.2rem;}

.course-card.size-sm .body{padding:14px;}
.course-card.size-sm h3{font-size:.92rem;}
.course-card.size-lg .body{padding:26px;}
.course-card.size-lg h3{font-size:1.2rem;}

/* ==========================================================================
   18. HEADER SEARCH
   ========================================================================== */
.search-toggle{background:var(--surface);border:1px solid var(--border);border-radius:50%;width:38px;height:38px;cursor:pointer;font-size:.95rem;}
.header-search-panel{max-height:0;overflow:hidden;transition:max-height .25s ease;border-bottom:1px solid transparent;}
.header-search-panel.is-open{max-height:90px;border-bottom-color:var(--border-soft);}
.header-search-panel .container{padding:16px 24px;}
.nexahub-search-form{display:flex;gap:10px;max-width:520px;}
.nexahub-search-form input{flex:1;padding:12px 16px;border-radius:var(--radius-pill);border:1px solid var(--border);background:var(--surface-2);font-family:var(--font-body);}
.nexahub-search-form button{border:none;background:var(--grad-primary);color:#fff;width:44px;border-radius:50%;cursor:pointer;}

/* ==========================================================================
   19. BREADCRUMBS
   ========================================================================== */
.breadcrumbs{padding:18px 0;font-size:.82rem;color:var(--text-faint);border-bottom:1px solid var(--border-soft);}
.breadcrumbs a{color:var(--text-muted);}
.breadcrumbs a:hover{color:var(--purple-dim);}
.breadcrumbs .sep{margin:0 4px;color:var(--text-faint);}
.breadcrumbs span:last-child{color:var(--text);}

/* ==========================================================================
   20. BACK TO TOP
   ========================================================================== */
.back-to-top{
  position:fixed;bottom:26px;right:26px;z-index:60;width:46px;height:46px;border-radius:50%;
  background:var(--grad-primary);color:#fff;border:none;box-shadow:var(--shadow-glow);cursor:pointer;
  font-size:1.1rem;opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .2s ease, transform .2s ease;
}
.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}