/* ═══════════════════════════════════════════════════════════════
   NexaTech — Global Stylesheet
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300..900;1,9..40,300..900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ─── RESET ───────────────────────────────────────────────────── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'DM Sans',system-ui,-apple-system,sans-serif;line-height:1.6;min-height:100vh;transition:background .35s,color .35s}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit}
::selection{background:#00b4d8;color:#fff}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--fg3);border-radius:3px}

/* ─── THEME VARIABLES ─────────────────────────────────────────── */
:root{
  --bg:#0a0f1a;--bg2:#111827;--bg3:#1a2332;--bg4:#243044;
  --fg:#f1f5f9;--fg2:#94a3b8;--fg3:#64748b;
  --primary:#1e3a5f;--accent:#00b4d8;--accent2:#0ea5e9;
  --gold:#f59e0b;--gold2:#fbbf24;
  --card:rgba(17,24,39,.85);--card-border:rgba(0,180,216,.12);
  --glow:rgba(0,180,216,.08);
  --success:#10b981;--error:#ef4444;
  --radius:14px;--radius-sm:10px;
  --shadow:0 4px 24px rgba(0,0,0,.2);
  --shadow-lg:0 20px 50px rgba(0,0,0,.3);
  --font-heading:'Space Grotesk','DM Sans',sans-serif;
}
[data-theme="light"]{
  --bg:#f8fafc;--bg2:#ffffff;--bg3:#f1f5f9;--bg4:#e2e8f0;
  --fg:#0f172a;--fg2:#475569;--fg3:#94a3b8;
  --card:rgba(255,255,255,.92);--card-border:rgba(0,132,199,.12);
  --glow:rgba(0,132,199,.06);
  --shadow:0 4px 24px rgba(0,0,0,.06);
  --shadow-lg:0 20px 50px rgba(0,0,0,.08);
}
body{background:var(--bg);color:var(--fg)}

/* ─── LAYOUT ──────────────────────────────────────────────────── */
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.flex{display:flex;align-items:center}
.flex-between{display:flex;align-items:center;justify-content:space-between}
.flex-center{display:flex;align-items:center;justify-content:center}
.flex-col{display:flex;flex-direction:column}
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-20{gap:20px}.gap-24{gap:24px}.gap-32{gap:32px}.gap-40{gap:40px}
.text-center{text-align:center}
.w-full{width:100%}

/* ─── TYPOGRAPHY ──────────────────────────────────────────────── */
h1,h2,h3,h4,h5{font-family:var(--font-heading);font-weight:800;color:var(--fg);line-height:1.15}
h1{font-size:clamp(2rem,5.5vw,4.2rem);letter-spacing:-2px}
h2{font-size:clamp(1.6rem,4vw,2.6rem);letter-spacing:-1px}
h3{font-size:1.2rem}
h4{font-size:1.05rem}
.gradient-text{background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.eyebrow{color:var(--accent);font-weight:700;font-size:.8rem;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.subtitle{font-size:1.1rem;color:var(--fg2);line-height:1.7;max-width:600px}
.section-header{margin-bottom:48px}
.section-header.centered{text-align:center}
.section-header.centered .subtitle{margin:12px auto 0}

/* ─── BUTTONS ─────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:var(--radius-sm);font-weight:600;font-size:.875rem;cursor:pointer;transition:all .25s;text-decoration:none;line-height:1}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:14px 28px}
.btn-outline{background:transparent;color:var(--accent);border:1.5px solid var(--accent);padding:13px 27px}
.btn-ghost{background:transparent;color:var(--fg2);padding:10px 16px}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1a1a;padding:14px 28px}
.btn-sm{padding:9px 18px;font-size:.8rem}
.btn-lg{padding:17px 36px;font-size:1rem}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,180,216,.2)}
.btn-outline:hover{background:var(--glow)}
.btn-ghost:hover{background:var(--bg3);color:var(--fg)}

/* ─── CARDS ───────────────────────────────────────────────────── */
.card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:28px;transition:all .3s;backdrop-filter:blur(10px)}
.card:hover,.card.hoverable:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.card-flat{transform:none!important;box-shadow:none!important}
.card-flat:hover{border-color:var(--card-border)!important}
.card-gradient{background:linear-gradient(135deg,var(--accent),var(--primary));border:none;color:#fff}
.card-gradient *{color:#fff!important}
.card-dark{background:linear-gradient(135deg,var(--primary),#0c1929);border:none;color:#fff}
.card-dark *{color:#fff!important}

/* ─── BADGES ──────────────────────────────────────────────────── */
.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:20px;font-size:.7rem;font-weight:700;letter-spacing:.5px}
.badge-accent{background:var(--accent);color:#fff}
.badge-gold{background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1a1a}
.badge-outline{background:var(--glow);color:var(--accent);border:1px solid var(--card-border)}
.badge-success{background:rgba(16,185,129,.15);color:var(--success)}
.badge-error{background:rgba(239,68,68,.15);color:var(--error)}

/* ─── ICON BOX ────────────────────────────────────────────────── */
.icon-box{width:52px;height:52px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.icon-box-gradient{background:linear-gradient(135deg,var(--accent),var(--primary))}
.icon-box-ghost{background:var(--glow)}
.icon-box svg{color:#fff}
.icon-box-ghost svg{color:var(--accent)}
.icon-box-sm{width:40px;height:40px;border-radius:var(--radius-sm)}
.icon-box-lg{width:64px;height:64px;border-radius:16px}

/* ─── FORMS ───────────────────────────────────────────────────── */
.form-group{display:flex;flex-direction:column;gap:6px}
.form-label{font-size:.8rem;font-weight:600;color:var(--fg2)}
.form-label .required{color:var(--error)}
.form-input,.form-textarea,.form-select{padding:12px 16px;border-radius:var(--radius-sm);border:1.5px solid var(--card-border);background:var(--bg3);color:var(--fg);font-size:.875rem;outline:none;transition:border-color .2s,box-shadow .2s}
.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--glow)}
.form-textarea{resize:vertical;min-height:120px}
.form-select{cursor:pointer}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-checkbox{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--fg2)}
.form-checkbox input{accent-color:var(--accent)}

/* ─── NAVBAR ──────────────────────────────────────────────────── */
.navbar{position:sticky;top:0;z-index:100;background:var(--bg);border-bottom:1px solid var(--card-border);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.navbar-inner{height:68px}
.nav-logo{display:flex;align-items:center;gap:10px;cursor:pointer}
.nav-logo-icon{width:36px;height:36px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--accent),var(--primary));display:flex;align-items:center;justify-content:center}
.nav-logo-icon svg{width:20px;height:20px;color:#fff}
.nav-logo-text{font-size:1.25rem;font-weight:800;font-family:var(--font-heading);color:var(--fg);letter-spacing:-.5px}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{padding:8px 16px;border-radius:8px;border:none;background:transparent;color:var(--fg2);font-weight:600;font-size:.875rem;transition:all .2s}
.nav-link:hover,.nav-link.active{background:var(--glow);color:var(--accent)}
.nav-divider{width:1px;height:24px;background:var(--card-border);margin:0 8px}
.nav-theme-btn{padding:8px;border-radius:8px;border:none;background:var(--bg3);color:var(--fg2);display:flex;align-items:center;justify-content:center;transition:all .2s}
.nav-theme-btn:hover{background:var(--bg4)}
.nav-mobile-btn{display:none;padding:8px;border:none;background:none;color:var(--fg)}
.nav-mobile-menu{display:none;padding:16px 24px 24px;border-top:1px solid var(--card-border);flex-direction:column;gap:4px}
.nav-mobile-menu .nav-link{text-align:left;padding:12px 16px;border-radius:var(--radius-sm);font-size:.95rem}

/* ─── HERO ────────────────────────────────────────────────────── */
.hero{position:relative;overflow:hidden;padding:100px 24px 80px;text-align:center}
.hero-compact{padding:80px 24px 40px}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 0%,var(--glow) 0%,transparent 70%)}
.hero-grid{position:absolute;inset:0;opacity:.4;background-image:radial-gradient(circle at 1px 1px,var(--fg3) .5px,transparent 0);background-size:40px 40px}
.hero-content{position:relative;max-width:900px;margin:0 auto}
.hero h1{margin:24px 0 20px}
.hero .subtitle{margin:0 auto 36px;max-width:600px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ─── STATS BAR ───────────────────────────────────────────────── */
.stats-bar{padding:64px 24px;background:var(--bg2)}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;max-width:1100px;margin:0 auto}
.stat-item{text-align:center}
.stat-number{font-size:3rem;font-weight:900;color:var(--accent);line-height:1;font-family:var(--font-heading)}
.stat-label{color:var(--fg2);font-size:.9rem;margin-top:8px;font-weight:500}

/* ─── SECTION ─────────────────────────────────────────────────── */
.section{padding:80px 24px}
.section-alt{background:var(--bg2)}
.section-cta{padding:80px 24px;background:linear-gradient(135deg,var(--primary),#0c1929)}
.section-cta h2,.section-cta p{color:#fff}
.section-cta p{color:rgba(255,255,255,.7)}

/* ─── SERVICE CARDS ───────────────────────────────────────────── */
.service-card{cursor:pointer}
.service-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px}
.service-card-title{font-size:1.05rem;flex:1;margin-right:8px}
.service-card-badges{display:flex;gap:6px;align-items:center;flex-shrink:0}
.service-card-body{font-size:.875rem;color:var(--fg2);line-height:1.6}
.service-card-details{border-top:1px solid var(--card-border);padding-top:16px;margin-top:16px;display:none;flex-direction:column;gap:16px}
.service-card.expanded .service-card-details{display:flex}
.service-card-section-title{font-size:.75rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}
.service-deliverable{display:flex;gap:8px;font-size:.8rem;color:var(--fg2);margin-bottom:4px;align-items:flex-start}
.service-deliverable svg{color:var(--success);flex-shrink:0;margin-top:3px}
.tag{padding:4px 10px;border-radius:6px;font-size:.75rem;display:inline-block;margin:2px}
.tag-ghost{background:var(--bg3);color:var(--fg2)}
.tag-accent{background:var(--glow);color:var(--accent);font-weight:600}

/* ─── FILTER BAR ──────────────────────────────────────────────── */
.filter-bar{position:sticky;top:68px;z-index:50;background:var(--bg);padding:12px 0 12px;overflow-x:auto}
.filter-bar-inner{display:flex;gap:8px;padding-bottom:4px}
.filter-btn{padding:10px 20px;border-radius:var(--radius-sm);border:1.5px solid var(--card-border);background:transparent;color:var(--fg2);font-weight:600;font-size:.8rem;white-space:nowrap;transition:all .2s;display:flex;align-items:center;gap:6px}
.filter-btn:hover{border-color:var(--fg3)}
.filter-btn.active{border-color:var(--accent);background:var(--glow);color:var(--accent)}

/* ─── CATEGORY GROUP ──────────────────────────────────────────── */
.category-group{margin-bottom:48px}
.category-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.category-header h3{font-size:1.25rem}
.category-count{font-size:.8rem;color:var(--fg3)}

/* ─── COURSE CARDS ────────────────────────────────────────────── */
.course-thumb{font-size:3rem;text-align:center;padding:28px 0;background:var(--bg3);border-radius:12px;margin-bottom:16px}
.course-tags{display:flex;gap:8px;margin-bottom:10px}
.course-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;font-size:.8rem;color:var(--fg3)}
.course-meta .rating{color:var(--gold);display:flex;align-items:center;gap:4px}
.course-footer{display:flex;justify-content:space-between;align-items:center}
.course-price{font-size:1.4rem;font-weight:800}
.course-price.free{color:var(--success)}

/* ─── LEARNING PATH CARDS ─────────────────────────────────────── */
.path-icon{font-size:2.2rem;margin-bottom:12px}
.path-meta{display:flex;gap:16px;font-size:.8rem;color:var(--fg3)}

/* ─── CONTACT PAGE ────────────────────────────────────────────── */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:start}
.contact-info-card .icon-box{margin-right:14px}
.contact-social{display:flex;justify-content:center;gap:12px;margin-top:12px}
.contact-social span{padding:6px 14px;border-radius:8px;background:rgba(255,255,255,.1);color:rgba(255,255,255,.8);font-size:.8rem;font-weight:600}
.success-state{text-align:center;padding:48px 0}
.success-icon{width:64px;height:64px;border-radius:50%;background:var(--glow);display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.success-icon svg{color:var(--success)}

/* ─── AUTH PAGES ──────────────────────────────────────────────── */
.auth-page{padding:80px 24px;display:flex;justify-content:center}
.auth-card{width:100%;max-width:440px;padding:36px}
.auth-card h2{margin-bottom:8px}
.auth-card .subtitle{margin-bottom:24px;font-size:.875rem}
.auth-divider{text-align:center;color:var(--fg3);font-size:.8rem;margin:16px 0;position:relative}
.auth-divider::before,.auth-divider::after{content:'';position:absolute;top:50%;width:calc(50% - 20px);height:1px;background:var(--card-border)}
.auth-divider::before{left:0}
.auth-divider::after{right:0}
.auth-social-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
.auth-footer{text-align:center;font-size:.875rem;color:var(--fg3);margin-top:16px}
.auth-footer button,.auth-footer a{background:none;border:none;color:var(--accent);font-weight:600;cursor:pointer;font-family:inherit;font-size:.875rem}

/* ─── DASHBOARD ───────────────────────────────────────────────── */
.dashboard{display:flex;min-height:calc(100vh - 68px)}
.sidebar{width:240px;padding:24px 16px;border-right:1px solid var(--card-border);background:var(--bg2);flex-shrink:0;display:flex;flex-direction:column}
.sidebar-user{display:flex;align-items:center;gap:12px;margin-bottom:32px;padding:0 8px}
.sidebar-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--primary));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.875rem}
.sidebar-name{font-size:.875rem;font-weight:700;color:var(--fg)}
.sidebar-role{font-size:.75rem;color:var(--fg3)}
.sidebar-link{width:100%;padding:10px 12px;border-radius:var(--radius-sm);border:none;display:flex;align-items:center;gap:10px;background:transparent;color:var(--fg2);font-weight:600;font-size:.875rem;margin-bottom:4px;transition:all .2s;text-align:left}
.sidebar-link:hover{background:var(--bg3)}
.sidebar-link.active{background:var(--glow);color:var(--accent)}
.sidebar-link svg{width:18px;height:18px}
.sidebar-footer{margin-top:auto;padding-top:24px;border-top:1px solid var(--card-border)}
.dash-main{flex:1;padding:32px;overflow-y:auto}
.dash-stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:32px}
.dash-stat-value{font-size:2rem;font-weight:900;font-family:var(--font-heading)}
.dash-stat-label{font-size:.8rem;color:var(--fg3);margin-bottom:4px}
.progress-bar{background:var(--bg3);border-radius:6px;height:8px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:6px;transition:width 1s}
.activity-item{padding:12px 0;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--card-border)}
.activity-item:last-child{border-bottom:none}
.activity-text{font-size:.875rem;color:var(--fg2)}
.activity-time{font-size:.75rem;color:var(--fg3);white-space:nowrap;margin-left:16px}

/* ─── FOOTER ──────────────────────────────────────────────────── */
.footer{background:var(--bg2);border-top:1px solid var(--card-border);padding:64px 24px 32px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:48px}
.footer-heading{font-size:.875rem;font-weight:700;margin-bottom:16px}
.footer-link{display:block;font-size:.8rem;color:var(--fg3);margin-bottom:8px;cursor:pointer;transition:color .2s}
.footer-link:hover{color:var(--accent)}
.footer-contact{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--fg3);margin-bottom:8px}
.footer-contact svg{width:14px;height:14px;flex-shrink:0}
.footer-bottom{border-top:1px solid var(--card-border);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-copy{font-size:.8rem;color:var(--fg3)}

/* ─── SCROLL ANIMATIONS ──────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s,transform .7s}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}

/* ─── TOAST ───────────────────────────────────────────────────── */
.toast{position:fixed;bottom:32px;right:32px;padding:16px 24px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:600;z-index:9999;transform:translateY(120%);opacity:0;transition:all .4s}
.toast.show{transform:translateY(0);opacity:1}
.toast-success{background:var(--success);color:#fff}
.toast-error{background:var(--error);color:#fff}

/* ─── RESPONSIVE ──────────────────────────────────────────────── */
@media(max-width:1024px){
  .contact-grid{grid-template-columns:1fr}
  .dashboard{flex-direction:column}
  .sidebar{width:100%;flex-direction:row;overflow-x:auto;padding:12px 16px;border-right:none;border-bottom:1px solid var(--card-border)}
  .sidebar-user{display:none}
  .sidebar-footer{display:none}
  .sidebar-link{white-space:nowrap}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-mobile-btn{display:flex!important}
  .nav-mobile-menu.open{display:flex}
  .form-row{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
  .hero{padding:64px 24px 48px}
  .hero-compact{padding:64px 24px 32px}
  .section{padding:48px 24px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  h1{letter-spacing:-1px}
  .auth-social-grid{grid-template-columns:1fr}
  .dash-main{padding:20px}
}
@media(max-width:420px){
  .stats-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:center}
  .hero-actions .btn{width:100%;justify-content:center}
}