/* ============ Reset & Base ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-light:#60a5fa;
  --accent:#6366f1;
  --bg:#f6f9ff;
  --bg-alt:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:rgba(15,23,42,.08);
  --glass:rgba(255,255,255,.65);
  --glass-strong:rgba(255,255,255,.85);
  --shadow-sm:0 2px 8px rgba(37,99,235,.06);
  --shadow:0 10px 30px -10px rgba(37,99,235,.18);
  --shadow-lg:0 25px 60px -20px rgba(37,99,235,.35);
  --radius:18px;
  --radius-lg:26px;
  --gradient:linear-gradient(135deg,#2563eb 0%,#6366f1 100%);
  --gradient-soft:linear-gradient(135deg,#dbeafe 0%,#e0e7ff 100%);
}
[data-theme="dark"]{
  --bg:#0b1220;
  --bg-alt:#101a30;
  --text:#e2e8f0;
  --muted:#94a3b8;
  --border:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.05);
  --glass-strong:rgba(255,255,255,.08);
  --shadow:0 10px 30px -10px rgba(0,0,0,.5);
}
body{
  font-family:'Poppins',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  transition:background .3s,color .3s;
  position:relative;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.container.narrow{max-width:820px}

/* ============ Animated background ============ */
.animated-bg{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.animated-bg .orb{
  position:absolute;border-radius:50%;filter:blur(80px);opacity:.45;
  animation:drift 22s ease-in-out infinite;
}
.orb1{width:520px;height:520px;background:radial-gradient(circle,#60a5fa,transparent 70%);top:-120px;left:-120px}
.orb2{width:480px;height:480px;background:radial-gradient(circle,#a78bfa,transparent 70%);top:30%;right:-140px;animation-delay:-6s}
.orb3{width:420px;height:420px;background:radial-gradient(circle,#34d399,transparent 70%);bottom:-100px;left:20%;animation-delay:-12s;opacity:.32}
.orb4{width:380px;height:380px;background:radial-gradient(circle,#f472b6,transparent 70%);top:60%;left:50%;animation-delay:-9s;opacity:.28}
[data-theme="dark"] .animated-bg .orb{opacity:.32}
.grid-overlay{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(99,102,241,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(99,102,241,.06) 1px,transparent 1px);
  background-size:50px 50px;
  mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%);
}
@keyframes drift{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(60px,-40px) scale(1.1)}
  66%{transform:translate(-50px,50px) scale(.95)}
}

/* ============ Loader ============ */
.loader{position:fixed;inset:0;background:var(--bg);z-index:9999;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;transition:opacity .5s}
.loader.hidden{opacity:0;pointer-events:none}
.loader-ring{width:54px;height:54px;border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}
.loader p{color:var(--muted);font-weight:500}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============ Toast ============ */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(120px);background:var(--text);color:var(--bg);padding:14px 24px;border-radius:14px;font-weight:500;z-index:9000;box-shadow:var(--shadow-lg);opacity:0;transition:all .35s cubic-bezier(.4,0,.2,1);max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============ Glass ============ */
.glass{background:var(--glass);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border:1px solid var(--border)}

/* ============ Buttons ============ */
.btn-primary,.btn-outline,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:12px;font-weight:600;font-size:14px;transition:all .25s;white-space:nowrap}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 6px 20px -6px rgba(37,99,235,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px -8px rgba(37,99,235,.7)}
.btn-outline{border:1.5px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-ghost{color:var(--text)}
.btn-ghost:hover{color:var(--primary)}
.btn-primary.lg,.btn-outline.lg{padding:14px 28px;font-size:15px;border-radius:14px}
.btn-primary.sm{padding:7px 14px;font-size:12px;border-radius:9px}
.w-full{width:100%}
.icon-btn{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:18px;transition:.2s}
.icon-btn:hover{background:var(--glass-strong)}

/* ============ Navbar ============ */
.navbar{position:sticky;top:0;z-index:1000;border-bottom:1px solid var(--border);transition:all .3s}
.navbar.scrolled{box-shadow:var(--shadow-sm)}
.nav-inner{max-width:1320px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:20px;flex-shrink:0}
.logo-mark{font-size:24px}
.logo-text span{background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links>a{padding:8px 14px;font-size:14px;font-weight:500;color:var(--muted);border-radius:8px;transition:.2s}
.nav-links>a:hover{color:var(--primary);background:var(--glass-strong)}
.nav-links>a.btn-primary{color:#fff}
.nav-links>a.btn-ghost{color:var(--text);border:1px solid var(--border)}
.nav-actions{display:flex;align-items:center;gap:8px}
.mobile-only{display:none}

/* ============ Hero ============ */
.hero{position:relative;padding:60px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(99,102,241,.15),transparent 50%),radial-gradient(circle at 80% 70%,rgba(37,99,235,.18),transparent 50%);z-index:0}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.pill{display:inline-block;padding:6px 14px;background:var(--glass-strong);border:1px solid var(--border);border-radius:999px;font-size:13px;font-weight:500;color:var(--primary);margin-bottom:20px}
.hero h1{font-size:clamp(2.2rem,5vw,3.8rem);font-weight:800;line-height:1.1;letter-spacing:-.02em;margin-bottom:18px}
.gradient-text{background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(1rem,1.4vw,1.15rem);color:var(--muted);margin-bottom:28px;max-width:560px}
.hero-search{display:flex;align-items:center;gap:10px;padding:8px 8px 8px 18px;border-radius:16px;margin-bottom:24px;max-width:540px}
.hero-search span{font-size:18px}
.hero-search input{flex:1;border:none;background:transparent;outline:none;font-size:15px;font-family:inherit;color:var(--text);min-width:0;padding:8px 0}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
.hero-trust{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.avatars{display:flex}
.avatars span{width:36px;height:36px;border-radius:50%;background:var(--gradient);color:#fff;display:grid;place-items:center;font-weight:600;font-size:13px;border:2px solid var(--bg);margin-left:-10px}
.avatars span:first-child{margin-left:0}
.hero-trust p{font-size:14px;color:var(--muted)}

.hero-visual{position:relative;height:480px}
.blob{position:absolute;inset:0;background:var(--gradient);filter:blur(80px);opacity:.25;border-radius:50%;animation:pulse 6s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.25}50%{transform:scale(1.08);opacity:.35}}
.hero-illustration{position:relative;width:100%;height:100%;border-radius:var(--radius-lg);overflow:hidden}
.hero-illustration img{width:100%;height:100%;object-fit:cover}
.float-card{position:absolute;display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:14px;box-shadow:var(--shadow);animation:float 6s ease-in-out infinite;background:var(--glass-strong);backdrop-filter:blur(20px)}
.float-card span{font-size:22px}
.float-card strong{display:block;font-size:15px;font-weight:700}
.float-card small{color:var(--muted);font-size:11px}
.float1{top:20px;left:-20px}
.float2{top:50%;right:-20px;animation-delay:-2s}
.float3{bottom:20px;left:30px;animation-delay:-4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

/* ============ Stats ============ */
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin:-40px auto 60px;padding:0 24px;position:relative;z-index:2}
.stat-card{padding:24px 16px;border-radius:var(--radius);text-align:center;transition:.3s}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat-card h3{font-size:clamp(1.4rem,2.2vw,1.9rem);font-weight:800;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-card p{font-size:13px;color:var(--muted);font-weight:500;margin-top:4px}

/* ============ Section ============ */
.section{padding:80px 0;position:relative}
.section.alt{background:color-mix(in srgb, var(--bg-alt) 85%, transparent)}
.section-head{text-align:center;max-width:680px;margin:0 auto 50px}
.eyebrow{display:inline-block;padding:5px 14px;background:var(--gradient-soft);color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;border-radius:999px;margin-bottom:14px}
[data-theme="dark"] .eyebrow{background:rgba(99,102,241,.15)}
.section-head h2{font-size:clamp(1.8rem,3vw,2.5rem);font-weight:700;letter-spacing:-.02em;margin-bottom:12px}
.section-head p{color:var(--muted)}

/* ============ Grids ============ */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-5{grid-template-columns:repeat(5,1fr)}

/* ============ Cards ============ */
.cat-card,.course-card,.exam-card,.upload-card,.uni-card,.feature-card{
  background:var(--bg-alt);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  transition:all .3s cubic-bezier(.4,0,.2,1);
  position:relative;
  overflow:hidden;
}
.cat-card:hover,.course-card:hover,.exam-card:hover,.upload-card:hover,.uni-card:hover,.feature-card:hover{
  transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent
}
.exam-card span,.feature-card span{display:inline-grid;place-items:center;width:54px;height:54px;border-radius:14px;background:var(--gradient-soft);font-size:24px;margin-bottom:14px;transition:.3s}
[data-theme="dark"] .exam-card span,[data-theme="dark"] .feature-card span{background:rgba(99,102,241,.15)}
.exam-card h4{font-size:15px;font-weight:600}
.feature-card h4{font-size:16px;font-weight:600;margin-bottom:6px}
.feature-card p{font-size:13px;color:var(--muted)}

/* Image cards (categories + universities) */
.img-card{padding:0;display:flex;flex-direction:column;text-align:center}
.img-card img{width: 100%;
    height: 220px;
    object-fit: cover;
    object-position: center top;
    border-radius: 18px 18px 0 0;transition:transform .5s ease}
.img-card:hover img{transform:scale(1.08)}
.img-card h4{padding:14px 16px 8px;font-size:15px;font-weight:600}
.img-card p{padding:0 16px 16px;font-size:12px;color:var(--muted)}

.course-card{background:var(--gradient-soft);text-align:center;padding:30px 20px}
[data-theme="dark"] .course-card{background:rgba(99,102,241,.1)}
.course-card h4{font-size:22px;font-weight:700;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:6px}
.course-card p{font-size:13px;color:var(--muted)}

/* Trending */
.trend-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:.3s}
.trend-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.trend-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px;gap:10px}
.trend-head h4{font-size:17px;font-weight:600}
.trend-head .sem{font-size:11px;padding:4px 9px;background:var(--gradient-soft);color:var(--primary);border-radius:6px;font-weight:600;flex-shrink:0}
[data-theme="dark"] .trend-head .sem{background:rgba(99,102,241,.15)}
.trend-meta{display:flex;gap:14px;font-size:13px;color:var(--muted);margin-bottom:16px;flex-wrap:wrap}
.trend-actions{display:flex;gap:8px;flex-wrap:wrap}

/* Table */
.table-wrap{border-radius:var(--radius);overflow-x:auto;padding:6px;-webkit-overflow-scrolling:touch}
.papers-table{width:100%;border-collapse:collapse;min-width:600px}
.papers-table th,.papers-table td{padding:14px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--border)}
.papers-table th{font-weight:600;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em;background:var(--glass-strong)}
.papers-table tbody tr{transition:.2s}
.papers-table tbody tr:hover{background:var(--glass-strong)}
.papers-table tbody tr:last-child td{border-bottom:none}

/* Pricing */
.pricing{align-items:stretch}
.price-card{border-radius:var(--radius-lg);padding:34px 28px;display:flex;flex-direction:column;position:relative;transition:.3s}
.price-card:hover{transform:translateY(-6px)}
.price-card.featured{background:var(--gradient);color:#fff;border:none;box-shadow:var(--shadow-lg);transform:scale(1.04)}
.price-card.featured:hover{transform:scale(1.04) translateY(-6px)}
.price-card.featured .muted,.price-card.featured h3,.price-card.featured .price{color:#fff}
.price-card .badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:#fbbf24;color:#0f172a;padding:5px 14px;border-radius:999px;font-size:11px;font-weight:700}
.price-card h3{font-size:20px;font-weight:600;margin-bottom:10px}
.price{font-size:42px;font-weight:800;margin-bottom:22px}
.price small{font-size:14px;font-weight:500;opacity:.7}
.price-card ul{list-style:none;flex:1;margin-bottom:24px}
.price-card li{padding:8px 0;font-size:14px;border-bottom:1px solid var(--border)}
.price-card.featured li{border-color:rgba(255,255,255,.15)}
.price-card .muted{opacity:.5}
.price-card.featured .btn-primary{background:#fff;color:var(--primary)}
.price-card.featured .btn-primary:hover{background:#f1f5f9}

/* Testimonials */
.testimonial-carousel{overflow:hidden;position:relative}
.testimonial-track{display:flex;transition:transform .6s cubic-bezier(.4,0,.2,1)}
.testimonial{min-width:100%;padding:34px;border-radius:var(--radius-lg);text-align:center;margin:0 12px}
@media(min-width:768px){.testimonial{min-width:calc(50% - 24px)}}
@media(min-width:1024px){.testimonial{min-width:calc(33.333% - 24px)}}
.testimonial p{font-size:16px;font-style:italic;margin-bottom:14px;color:var(--text)}
.testimonial h5{font-size:13px;color:var(--muted);font-weight:600}
.dots{display:flex;justify-content:center;gap:8px;margin-top:24px}
.dots button{width:10px;height:10px;border-radius:50%;background:var(--border);transition:.2s}
.dots button.active{background:var(--primary);width:28px;border-radius:5px}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:12px}
.faq details{background:var(--bg-alt);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:.2s}
.faq details[open]{box-shadow:var(--shadow-sm);border-color:var(--primary-light)}
.faq summary{padding:18px 22px;font-weight:600;font-size:15px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;list-style:none;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary span{font-size:22px;color:var(--primary);transition:.3s;font-weight:300;flex-shrink:0}
.faq details[open] summary span{transform:rotate(45deg)}
.faq p{padding:0 22px 18px;color:var(--muted);font-size:14px}

/* Newsletter */
.newsletter{padding:60px 0}
.newsletter-card{padding:40px;border-radius:var(--radius-lg);display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.newsletter-card h2{font-size:1.8rem;font-weight:700;margin-bottom:8px}
.newsletter-card p{color:var(--muted)}
.newsletter-card form{display:flex;gap:10px}
.newsletter-card input{flex:1;padding:14px 18px;border:1px solid var(--border);background:var(--bg-alt);border-radius:12px;outline:none;font-family:inherit;color:var(--text);font-size:14px;min-width:0}
.newsletter-card input:focus{border-color:var(--primary)}

/* Footer */
.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:60px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer h5{font-size:14px;font-weight:600;margin-bottom:16px}
.footer a{display:block;font-size:14px;color:var(--muted);padding:5px 0;transition:.2s}
.footer a:hover{color:var(--primary)}
.footer .logo{margin-bottom:14px}
.footer .muted{font-size:14px;color:var(--muted);margin-bottom:18px}
.socials{display:flex;gap:10px}
.socials a{width:38px;height:38px;border-radius:10px;background:var(--bg);display:grid;place-items:center;font-weight:600;padding:0}
.socials a:hover{background:var(--gradient);color:#fff}
.copyright{text-align:center;font-size:13px;color:var(--muted);padding-top:24px;border-top:1px solid var(--border)}

/* Back to top */
.back-top{position:fixed;bottom:24px;right:24px;width:48px;height:48px;border-radius:50%;background:var(--gradient);color:#fff;font-size:22px;font-weight:700;box-shadow:var(--shadow-lg);opacity:0;transform:translateY(20px);transition:.3s;z-index:500}
.back-top.show{opacity:1;transform:translateY(0)}
.back-top:hover{transform:translateY(-4px)}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ============ Auth pages ============ */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:stretch}
.auth-side{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#1e3a8a 0%,#4338ca 50%,#6d28d9 100%);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:48px;
}
.auth-side::before{
  content:"";position:absolute;inset:0;
  background:url('https://images.unsplash.com/photo-1513258496099-48168024aec0?auto=format&fit=crop&w=1400&q=70') center/cover;
  opacity:.18;mix-blend-mode:overlay;
}
.auth-side > *{position:relative;z-index:1}
.auth-side .logo{color:#fff;font-size:22px}
.auth-side .logo-text span{color:#fbbf24;-webkit-text-fill-color:#fbbf24}
.auth-hero h2{font-size:clamp(1.8rem,3vw,2.6rem);font-weight:800;line-height:1.15;margin-bottom:14px}
.auth-hero p{opacity:.9;font-size:15px;max-width:380px;line-height:1.6}
.auth-points{display:grid;gap:14px;margin-top:30px}
.auth-points li{display:flex;align-items:center;gap:12px;font-size:14px;list-style:none}
.auth-points li span{width:30px;height:30px;display:grid;place-items:center;border-radius:8px;background:rgba(255,255,255,.15);font-size:16px}
.auth-form-wrap{
  display:flex;align-items:center;justify-content:center;padding:48px 32px;background:var(--bg-alt);
}
.auth-card{width:100%;max-width:420px}
.auth-card h1{font-size:1.85rem;font-weight:800;margin-bottom:6px;letter-spacing:-.01em}
.auth-card .sub{color:var(--muted);font-size:14px;margin-bottom:28px}
.auth-form{display:grid;gap:16px}
.field{display:grid;gap:6px}
.field label{font-size:13px;font-weight:600;color:var(--muted)}
.field input{
  padding:13px 16px;border:1.5px solid var(--border);border-radius:12px;
  background:var(--bg);color:var(--text);font-family:inherit;font-size:14px;outline:none;
  transition:.2s;
}
.field input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
.row-between{display:flex;justify-content:space-between;align-items:center;font-size:13px;flex-wrap:wrap;gap:8px}
.row-between label{display:inline-flex;align-items:center;gap:6px;color:var(--muted);cursor:pointer}
.row-between a{color:var(--primary);font-weight:600}
.divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px;margin:8px 0}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--border)}
.social-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.social-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 14px;border:1.5px solid var(--border);border-radius:12px;
  font-size:13px;font-weight:600;background:var(--bg-alt);transition:.2s;
}
.social-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.auth-foot{text-align:center;font-size:14px;color:var(--muted);margin-top:18px}
.auth-foot a{color:var(--primary);font-weight:600}
.back-home{position:absolute;top:24px;left:24px;color:#fff;font-size:13px;opacity:.85;display:inline-flex;align-items:center;gap:6px}
.back-home:hover{opacity:1}

/* ============ Responsive ============ */
@media(max-width:1100px){
  .nav-links>a:not(.btn-primary):not(.btn-ghost){padding:8px 10px;font-size:13px}
}
@media(max-width:960px){
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-text .pill,.hero-trust{justify-content:center}
  .hero-text .lead,.hero-search{margin-left:auto;margin-right:auto}
  .hero-cta,.hero-trust{justify-content:center}
  .hero-visual{height:380px;max-width:480px;margin:0 auto}
  .stats{grid-template-columns:repeat(3,1fr)}
  .grid-4,.grid-5{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .newsletter-card{grid-template-columns:1fr;text-align:center}
  .auth-wrap{grid-template-columns:1fr}
  .auth-side{padding:36px 28px;min-height:auto}
  .auth-points{display:none}
  .auth-form-wrap{padding:36px 22px}
}
@media(max-width:780px){
  .mobile-only{display:grid}
  .nav-links{
    position:fixed;top:72px;right:12px;left:12px;
    flex-direction:column;align-items:stretch;
    background:var(--bg-alt);border:1px solid var(--border);
    border-radius:18px;padding:14px;box-shadow:var(--shadow-lg);
    transform:translateY(-20px) scale(.95);opacity:0;pointer-events:none;
    transition:.25s cubic-bezier(.4,0,.2,1);gap:4px;
  }
  .nav-links.open{transform:translateY(0) scale(1);opacity:1;pointer-events:auto}
  .nav-links>a{display:block;width:100%;text-align:center;padding:12px 14px;font-size:15px}
  .grid-3,.grid-4,.grid-5{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-30px}
  .section{padding:60px 0}
  .pricing{grid-template-columns:1fr !important}
  .price-card.featured{transform:none}
  .price-card.featured:hover{transform:translateY(-6px)}
  .newsletter-card{padding:28px}
  .newsletter-card form{flex-direction:column}
  .hero{padding:40px 0 60px}
  .hero h1{font-size:2.2rem}
  .float-card{padding:9px 12px}
  .float-card strong{font-size:13px}
  .float-card small{font-size:10px}
  .hero-search{flex-wrap:wrap;padding:10px}
  .hero-search input{min-width:0;width:100%}
  .hero-search .btn-primary{width:100%}
  .auth-side{padding:30px 22px}
  .auth-hero h2{font-size:1.5rem}
  .auth-form-wrap{padding:28px 18px}
  .social-row{grid-template-columns:1fr}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .nav-inner{padding:12px 16px;gap:10px}
  .logo{font-size:18px}
  .logo-mark{font-size:20px}
  .grid-3,.grid-4,.grid-5{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:10px}
  .stat-card{padding:18px 10px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-visual{height:300px}
  .hero h1{font-size:1.9rem}
  .lead{font-size:.95rem}
  .float1{top:10px;left:-5px}
  .float2{right:-5px}
  .float3{bottom:10px;left:10px}
  .img-card img{height:140px}
  .price-card{padding:26px 20px}
  .auth-card h1{font-size:1.55rem}
  .papers-table th,.papers-table td{padding:10px 12px;font-size:13px}
  .back-top{bottom:18px;right:18px;width:42px;height:42px;font-size:18px}
}




@media (max-width: 780px){

    .nav-inner{
        justify-content: space-between;
    }

    .nav-actions{
        margin-left: auto;
        display: flex;
        align-items: center;
        gap: 12px;
    }

    #themeToggle{
        margin-right: 4px;
    }

    #menuToggle{
        margin-left: 4px;
    }

}









.copyright{
    text-align: center;
    line-height: 1.8;
}

.copyright a{
    display: inline;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.copyright a:hover{
    text-decoration: underline;
}