/* ==========================================================================
   AI Pro Academy — Style Sheet
   ========================================================================== */

:root{
  --navy-950:#070c1a;
  --navy-900:#0a1226;
  --navy-800:#0e1a35;
  --navy-700:#132248;
  --blue-600:#1656d8;
  --blue-500:#2f6fef;
  --cyan-400:#22d3ee;
  --cyan-300:#5eead4;
  --ink:#0b1220;
  --gray-600:#5b667a;
  --gray-400:#8b95a8;
  --gray-200:#e3e7ef;
  --gray-100:#f3f5fa;
  --white:#ffffff;
  --success:#16a34a;
  --danger:#e11d48;

  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;

  --shadow-sm:0 2px 10px rgba(10,18,38,.06);
  --shadow-md:0 12px 30px rgba(10,18,38,.10);
  --shadow-lg:0 24px 60px rgba(10,18,38,.16);

  --container:1200px;
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ text-decoration:none; color:inherit; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-weight:800; line-height:1.2; color:var(--navy-950); }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }
input, select{ font-family:inherit; }

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  border-radius:var(--radius-sm);
  font-weight:700;
  font-size:.98rem;
  border:2px solid transparent;
  transition:all .25s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue-600),var(--blue-500));
  color:var(--white);
  box-shadow:0 10px 24px rgba(22,86,216,.28);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 14px 30px rgba(22,86,216,.36); }
.btn-outline{
  background:transparent;
  border-color:rgba(255,255,255,.5);
  color:var(--white);
}
.btn-outline:hover{ background:rgba(255,255,255,.12); border-color:var(--white); }
.btn-white{
  background:var(--white);
  color:var(--blue-600);
  flex-shrink:0;
}
.btn-white:hover{ transform:translateY(-2px); box-shadow:var(--shadow-md); }
.btn-lg{ padding:16px 32px; font-size:1.05rem; }
.btn-block{ width:100%; }

.text-accent{ color:var(--cyan-400); }

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0; left:0; right:0;
  z-index:1000;
  background:rgba(7,12,26,.0);
  transition:background .3s ease, box-shadow .3s ease, padding .3s ease;
  padding:18px 0;
}
.site-header.scrolled{
  background:rgba(7,12,26,.92);
  backdrop-filter:blur(10px);
  box-shadow:0 4px 20px rgba(0,0,0,.2);
  padding:12px 0;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--white);
  font-size:1.2rem;
  font-weight:700;
}
.brand-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px; height:38px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--blue-600),var(--cyan-400));
  color:var(--white);
  font-size:1.05rem;
}
.brand-text strong{ color:var(--cyan-400); font-weight:800; }

.main-nav{
  display:flex;
  align-items:center;
  gap:30px;
}
.main-nav a{
  color:rgba(255,255,255,.85);
  font-weight:600;
  font-size:.96rem;
  position:relative;
  padding:4px 0;
  transition:color .2s;
}
.main-nav a:hover{ color:var(--cyan-400); }

.header-actions{
  display:flex;
  align-items:center;
  gap:16px;
}

.nav-toggle{
  display:none;
  background:none;
  border:none;
  color:var(--white);
  font-size:1.4rem;
}

/* ---------- Language switcher ---------- */
.lang-switcher{
  position:relative;
}
.lang-current{
  display:flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.18);
  color:var(--white);
  font-weight:700;
  font-size:.88rem;
  padding:9px 14px;
  border-radius:50px;
  transition:all .2s ease;
}
.lang-current:hover{
  background:rgba(34,211,238,.15);
  border-color:rgba(34,211,238,.4);
}
.lang-current i.fa-globe{ font-size:.85rem; color:var(--cyan-400); }
.lang-caret{ font-size:.7rem; transition:transform .2s ease; }
.lang-switcher.open .lang-caret{ transform:rotate(180deg); }

.lang-dropdown{
  position:absolute;
  top:calc(100% + 10px);
  right:0;
  min-width:150px;
  background:var(--white);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-lg);
  padding:8px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:all .2s ease;
  z-index:1200;
}
.lang-switcher.open .lang-dropdown{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.lang-dropdown li{ list-style:none; }
.lang-dropdown button{
  width:100%;
  text-align:left;
  background:none;
  border:none;
  padding:11px 14px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:.92rem;
  color:var(--navy-950);
  transition:background .2s ease;
}
.lang-dropdown button:hover{ background:var(--gray-100); }
.lang-dropdown button.active{
  background:rgba(22,86,216,.08);
  color:var(--blue-600);
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  overflow:hidden;
  padding-top:120px;
  padding-bottom:60px;
}
.hero-bg{
  position:absolute;
  top:0; left:0; right:0; bottom:0;
  z-index:0;
}
.hero-bg img{
  width:100%; height:100%;
  object-fit:cover;
}
.hero-overlay{
  position:absolute; inset:0;
  background:linear-gradient(115deg, rgba(7,12,26,.94) 0%, rgba(7,12,26,.85) 40%, rgba(10,20,45,.55) 75%, rgba(10,20,45,.35) 100%);
}
.hero-content{ position:relative; z-index:1; max-width:760px; }

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(34,211,238,.14);
  border:1px solid rgba(34,211,238,.4);
  color:var(--cyan-400);
  font-weight:700;
  font-size:.85rem;
  padding:8px 16px;
  border-radius:50px;
  margin-bottom:24px;
}
.hero h1{
  color:var(--white);
  font-size:clamp(2.1rem, 4.5vw, 3.5rem);
  margin-bottom:20px;
  letter-spacing:-0.5px;
}
.hero-desc{
  color:rgba(255,255,255,.85);
  font-size:1.12rem;
  max-width:620px;
  margin-bottom:36px;
}
.hero-desc strong{ color:var(--cyan-300); }

.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:56px;
}

.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  max-width:640px;
  border-top:1px solid rgba(255,255,255,.18);
  padding-top:28px;
}
.stat-item{ display:flex; flex-direction:column; gap:4px; }
.stat-num{ color:var(--white); font-size:1.5rem; font-weight:800; }
.stat-label{ color:rgba(255,255,255,.65); font-size:.82rem; }

/* ---------- Announcement ---------- */
.announcement{
  background:linear-gradient(135deg,var(--blue-600),#0d3fb0);
  padding:34px 0;
}
.announcement-inner{
  display:flex;
  align-items:center;
  gap:24px;
}
.announcement-icon{
  flex-shrink:0;
  width:56px; height:56px;
  border-radius:50%;
  background:rgba(255,255,255,.15);
  color:var(--white);
  display:flex; align-items:center; justify-content:center;
  font-size:1.4rem;
}
.announcement-text{ flex:1; }
.announcement-text h3{ color:var(--white); font-size:1.15rem; margin-bottom:6px; }
.announcement-text p{ color:rgba(255,255,255,.85); font-size:.95rem; max-width:720px; }

/* ---------- Section common ---------- */
section{ padding:100px 0; }
.section-tag{
  display:inline-block;
  color:var(--blue-600);
  background:rgba(22,86,216,.08);
  font-weight:700;
  font-size:.8rem;
  letter-spacing:.5px;
  text-transform:uppercase;
  padding:6px 14px;
  border-radius:50px;
  margin-bottom:16px;
}
.section-tag.light{
  color:var(--cyan-300);
  background:rgba(34,211,238,.12);
}
.section-head{
  max-width:680px;
  margin-bottom:56px;
}
.section-head h2{
  font-size:clamp(1.6rem, 3vw, 2.3rem);
  margin-bottom:14px;
}
.section-head p{ color:var(--gray-600); font-size:1.05rem; }
.section-head.light h2{ color:var(--white); }
.section-head.light p{ color:rgba(255,255,255,.7); }

/* ---------- About ---------- */
.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.about-media{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.about-media img{ width:100%; height:420px; object-fit:cover; }
.about-badge{
  position:absolute;
  bottom:20px; left:20px; right:20px;
  background:rgba(7,12,26,.85);
  color:var(--white);
  backdrop-filter:blur(6px);
  padding:14px 18px;
  border-radius:var(--radius-md);
  display:flex; align-items:center; gap:10px;
  font-weight:600;
  font-size:.92rem;
}
.about-badge i{ color:var(--cyan-400); }

.about-content p{ color:var(--gray-600); margin:18px 0 26px; font-size:1.05rem; }
.about-list{ display:flex; flex-direction:column; gap:14px; }
.about-list li{
  display:flex; align-items:flex-start; gap:12px;
  font-weight:600; color:var(--navy-950);
}
.about-list i{
  flex-shrink:0;
  width:24px; height:24px;
  border-radius:50%;
  background:rgba(22,86,216,.1);
  color:var(--blue-600);
  display:flex; align-items:center; justify-content:center;
  font-size:.72rem;
  margin-top:2px;
}

/* ---------- Program ---------- */
.program{ background:var(--gray-100); }
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  margin-bottom:60px;
}
.step-card{
  background:var(--white);
  border-radius:var(--radius-lg);
  padding:32px 26px;
  box-shadow:var(--shadow-sm);
  position:relative;
  transition:transform .25s ease, box-shadow .25s ease;
}
.step-card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-md); }
.step-num{
  position:absolute;
  top:20px; right:24px;
  font-size:1.6rem;
  font-weight:800;
  color:var(--gray-200);
}
.step-icon{
  width:56px; height:56px;
  border-radius:14px;
  background:linear-gradient(135deg,var(--blue-600),var(--cyan-400));
  color:var(--white);
  display:flex; align-items:center; justify-content:center;
  font-size:1.4rem;
  margin-bottom:20px;
}
.step-card h3{ font-size:1.15rem; margin-bottom:10px; }
.step-card p{ color:var(--gray-600); font-size:.94rem; }

.program-details{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.detail-card{
  background:var(--navy-950);
  border-radius:var(--radius-md);
  padding:26px 22px;
  text-align:center;
}
.detail-card i{ color:var(--cyan-400); font-size:1.5rem; margin-bottom:12px; display:block; }
.detail-card h4{ color:var(--white); font-size:1rem; margin-bottom:6px; }
.detail-card p{ color:rgba(255,255,255,.65); font-size:.88rem; }

/* ---------- Languages ---------- */
.languages{
  background:linear-gradient(135deg,var(--navy-950),var(--navy-800));
  position:relative;
}
.lang-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.lang-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-md);
  padding:28px 20px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  transition:all .25s ease;
}
.lang-card:hover{
  background:rgba(34,211,238,.1);
  border-color:rgba(34,211,238,.4);
  transform:translateY(-4px);
}
.lang-card i{ color:var(--cyan-400); font-size:1.6rem; }
.lang-card span{ color:var(--white); font-weight:700; font-size:1rem; text-align:center; }

/* ---------- Benefits ---------- */
.benefits-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  margin-bottom:56px;
}
.benefit-card{
  background:var(--white);
  border:1px solid var(--gray-200);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:all .25s ease;
}
.benefit-card:hover{ box-shadow:var(--shadow-md); transform:translateY(-6px); }
.benefit-media{ height:190px; overflow:hidden; }
.benefit-media img{ width:100%; height:100%; object-fit:cover; }
.benefit-card h3{
  display:flex; align-items:center; gap:10px;
  font-size:1.1rem;
  padding:22px 24px 0;
}
.benefit-card h3 i{ color:var(--blue-600); }
.benefit-card p{ color:var(--gray-600); padding:12px 24px 24px; font-size:.94rem; }

.benefits-extra{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.extra-item{
  display:flex;
  align-items:center;
  gap:14px;
  background:var(--gray-100);
  padding:20px;
  border-radius:var(--radius-md);
}
.extra-item i{ color:var(--blue-600); font-size:1.3rem; flex-shrink:0; }
.extra-item p{ font-weight:600; font-size:.92rem; color:var(--navy-950); }

/* ---------- Register ---------- */
.register{ background:var(--gray-100); }
.register-grid{
  display:grid;
  grid-template-columns:1fr 1.1fr;
  gap:60px;
  align-items:start;
}
.register-info p{ color:var(--gray-600); margin:18px 0 26px; font-size:1.05rem; }
.register-points{ display:flex; flex-direction:column; gap:14px; }
.register-points li{ display:flex; gap:12px; font-weight:600; color:var(--navy-950); }
.register-points i{ color:var(--success); margin-top:3px; }

.register-form{
  background:var(--white);
  border-radius:var(--radius-lg);
  padding:40px;
  box-shadow:var(--shadow-lg);
}
.register-form h3{ font-size:1.3rem; margin-bottom:26px; }
.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
.form-group{ margin-bottom:20px; }
.form-group label{
  display:block;
  font-weight:700;
  font-size:.9rem;
  margin-bottom:8px;
  color:var(--navy-950);
}
.req{ color:var(--danger); }
.form-group input, .form-group select{
  width:100%;
  padding:13px 16px;
  border:2px solid var(--gray-200);
  border-radius:var(--radius-sm);
  font-size:.96rem;
  color:var(--ink);
  background:var(--white);
  transition:border-color .2s;
}
.form-group input:focus, .form-group select:focus{
  outline:none;
  border-color:var(--blue-500);
}
.form-group.invalid input, .form-group.invalid select{ border-color:var(--danger); }
.error-msg{
  display:block;
  color:var(--danger);
  font-size:.8rem;
  margin-top:6px;
  min-height:0;
}
.checkbox-line{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:.9rem;
  color:var(--gray-600);
  margin-bottom:8px;
  cursor:pointer;
}
.checkbox-line input{ margin-top:3px; width:16px; height:16px; flex-shrink:0; }
.form-feedback{
  margin-top:18px;
  font-weight:600;
  font-size:.92rem;
  text-align:center;
}
.form-feedback.success{ color:var(--success); }
.form-feedback.error{ color:var(--danger); }
#submit-btn{ margin-top:8px; }
#submit-btn:disabled{ opacity:.7; cursor:not-allowed; }

/* ---------- FAQ ---------- */
.faq-list{ display:flex; flex-direction:column; gap:14px; max-width:820px; }
.faq-item{
  border:1px solid var(--gray-200);
  border-radius:var(--radius-md);
  overflow:hidden;
}
.faq-question{
  width:100%;
  display:flex;
  justify-content:space-between;
  align-items:center;
  background:var(--white);
  border:none;
  padding:20px 24px;
  font-size:1rem;
  font-weight:700;
  color:var(--navy-950);
  text-align:left;
}
.faq-question i{ color:var(--blue-600); transition:transform .25s ease; }
.faq-item.active .faq-question i{ transform:rotate(180deg); }
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
  background:var(--gray-100);
}
.faq-answer p{ padding:0 24px 20px; color:var(--gray-600); font-size:.94rem; }
.faq-item.active .faq-answer{ max-height:300px; }

/* ---------- Contact ---------- */
.contact{
  background:linear-gradient(135deg,var(--navy-950),var(--navy-700));
}
.contact-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:60px;
  align-items:center;
}
.contact-info p{ color:rgba(255,255,255,.7); margin:16px 0 28px; font-size:1.05rem; }
.contact-list{ display:flex; flex-direction:column; gap:16px; margin-bottom:30px; }
.contact-list li{
  display:flex; align-items:center; gap:14px;
  color:rgba(255,255,255,.9);
  font-weight:600;
}
.contact-list i{
  width:38px; height:38px;
  border-radius:10px;
  background:rgba(34,211,238,.12);
  color:var(--cyan-400);
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0;
}
.social-links{ display:flex; gap:12px; }
.social-links a{
  width:42px; height:42px;
  border-radius:50%;
  background:rgba(255,255,255,.08);
  color:var(--white);
  display:flex; align-items:center; justify-content:center;
  transition:all .2s ease;
}
.social-links a:hover{ background:var(--cyan-400); color:var(--navy-950); }

.contact-cta-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-lg);
  padding:40px;
  backdrop-filter:blur(6px);
}
.contact-cta-card h3{ color:var(--white); font-size:1.4rem; margin-bottom:14px; }
.contact-cta-card p{ color:rgba(255,255,255,.7); margin-bottom:26px; }

/* ---------- Footer ---------- */
.site-footer{ background:var(--navy-950); padding-top:70px; }
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:50px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{ display:flex; flex-direction:column; gap:12px; }
.footer-brand .brand-text{ color:var(--white); font-size:1.15rem; font-weight:700; }
.footer-brand .brand-text strong{ color:var(--cyan-400); }
.footer-brand p{ color:rgba(255,255,255,.55); font-size:.9rem; margin-top:6px; max-width:280px; }
.footer-brand .brand-icon{ margin-bottom:6px; }
.footer-col{ display:flex; flex-direction:column; gap:12px; }
.footer-col h4{ color:var(--white); font-size:1rem; margin-bottom:6px; }
.footer-col a, .footer-col span{ color:rgba(255,255,255,.6); font-size:.92rem; transition:color .2s; }
.footer-col a:hover{ color:var(--cyan-400); }
.footer-bottom{ padding:22px 0; }
.footer-bottom p{ color:rgba(255,255,255,.45); font-size:.85rem; text-align:center; }

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed;
  bottom:28px; right:28px;
  width:48px; height:48px;
  border-radius:50%;
  background:var(--blue-600);
  color:var(--white);
  display:flex; align-items:center; justify-content:center;
  box-shadow:var(--shadow-md);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:all .3s ease;
  z-index:900;
}
.back-to-top.show{ opacity:1; visibility:visible; transform:translateY(0); }
.back-to-top:hover{ background:var(--cyan-400); color:var(--navy-950); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1024px){
  .steps-grid, .program-details, .lang-grid, .benefits-grid, .benefits-extra{
    grid-template-columns:repeat(2,1fr);
  }
  .about-grid, .register-grid, .contact-grid{
    grid-template-columns:1fr;
    gap:40px;
  }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:30px; }
  .hero-stats{ grid-template-columns:repeat(2,1fr); }
}

@media (max-width:860px){
  .main-nav{
    position:fixed;
    top:0; right:0;
    height:100vh;
    width:280px;
    background:var(--navy-950);
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:6px;
    padding:100px 30px 30px;
    transform:translateX(100%);
    transition:transform .3s ease;
    z-index:999;
  }
  .main-nav.open{ transform:translateX(0); }
  .main-nav a{
    width:100%;
    padding:14px 0;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .nav-toggle{ display:block; }
  .header-cta{ display:none; }
  .lang-current span:not(.lang-caret){ display:inline; }
  .lang-current{ padding:8px 12px; }
}

@media (max-width:400px){
  .lang-current i.fa-globe{ display:none; }
}

@media (max-width:640px){
  section{ padding:70px 0; }
  .hero{ padding-top:110px; text-align:left; }
  .hero-actions{ flex-direction:column; align-items:stretch; }
  .hero-stats{ grid-template-columns:repeat(2,1fr); }
  .steps-grid, .program-details, .lang-grid, .benefits-grid, .benefits-extra{
    grid-template-columns:1fr;
  }
  .announcement-inner{ flex-direction:column; align-items:flex-start; text-align:left; }
  .form-row{ grid-template-columns:1fr; }
  .register-form{ padding:26px; }
  .footer-grid{ grid-template-columns:1fr; text-align:left; }
}