*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:Arial, sans-serif;
}

body{
  background:
    linear-gradient(rgba(0,0,0,0.72), rgba(0,0,0,0.92)),
    url("images/hero.jpg");

  background-size:cover;
  background-position:center;
  background-attachment:fixed;

  color:white;
}

/* NAVBAR */

.navbar{
  max-width:1150px;
  margin:auto;
  padding:24px 28px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.logo{
  color:#ffd700;
  font-weight:800;
  font-size:20px;
}

.navbar nav{
  display:flex;
  gap:32px;
}

.navbar a{
  color:#eee;
  text-decoration:none;
  font-weight:700;
  font-size:18px;
}

.navbar a:hover{
  color:#ffd700;
}

/* HERO */

.hero{
  position:relative;
  min-height:680px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  text-align:center;
  padding:60px 20px;
  overflow:hidden;
}

.glow{
  position:absolute;
  width:420px;
  height:420px;
  background:#ffd700;
  opacity:0.12;
  filter:blur(120px);
  border-radius:50%;
  z-index:-1;
}

.brand-circle{
  width:170px;
  height:170px;
  border:3px solid #ffd700;
  border-radius:50%;
  display:flex;
  justify-content:center;
  align-items:center;
  color:#ffd700;
  font-weight:900;
  box-shadow:0 0 35px rgba(255,215,0,0.35);
  margin-bottom:40px;
  background:rgba(0,0,0,0.35);
  backdrop-filter:blur(4px);
}

.hero h1{
  font-size:95px;
  line-height:1;
  font-weight:900;
  letter-spacing:-3px;
  text-shadow:0 10px 35px rgba(0,0,0,0.75);
}

.hero h1 span{
  color:#ffd700;
}

.hero p{
  margin:22px 0 30px;
  color:#d6d6d6;
  font-size:20px;
  max-width:520px;
}

.hero-buttons{
  display:flex;
  gap:22px;
  flex-wrap:wrap;
  justify-content:center;
}

/* BUTTONS */

.btn{
  display:inline-block;
  min-width:220px;
  padding:17px 28px;
  border-radius:10px;
  text-decoration:none;
  font-weight:900;
  text-align:center;
}

.gold{
  background:#ffd700;
  color:#000;
  box-shadow:0 0 25px rgba(255,215,0,0.25);
}

.dark{
  background:#141414;
  color:white;
  border:1px solid #222;
}

/* SECTIONS */

.why,
.courses-preview{
  max-width:1150px;
  margin:0 auto;
  padding:90px 28px;
  text-align:center;
}

.why h2,
.courses-preview h2{
  font-size:42px;
  margin-bottom:18px;
}

.why span,
.courses-preview span{
  color:#ffd700;
}

.features,
.course-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  margin-top:45px;
}

.feature-card,
.course-card{
  background:linear-gradient(180deg,rgba(18,18,18,0.94),rgba(7,7,7,0.96));
  border:1px solid #252525;
  border-radius:18px;
  padding:42px 28px;
  min-height:220px;
  box-shadow:0 20px 50px rgba(0,0,0,0.55);
  transition:0.25s;
  backdrop-filter:blur(5px);
}

.feature-card:hover,
.course-card:hover{
  transform:translateY(-8px);
  border-color:#ffd700;
  box-shadow:0 0 35px rgba(255,215,0,0.13);
}

.icon{
  width:55px;
  height:55px;
  border-radius:50%;
  background:rgba(255,215,0,0.12);
  color:#ffd700;
  display:flex;
  justify-content:center;
  align-items:center;
  margin:0 auto 22px;
  font-size:24px;
}

.feature-card h3,
.course-card h3{
  margin-bottom:14px;
  font-size:20px;
}

.feature-card p,
.course-card p,
.courses-preview > p{
  color:#bdbdbd;
  line-height:1.6;
}

.course-card{
  text-align:left;
}

.course-card h4{
  color:#ffd700;
  font-size:34px;
  margin:25px 0 20px;
}

.course-card .btn{
  margin-top:25px;
  width:100%;
}

/* FOOTER */

footer{
  background:rgba(10,10,10,0.92);
  padding:50px 28px;
  border-top:1px solid #252525;
  color:#aaa;
}

footer .logo{
  margin-bottom:15px;
}

footer p{
  margin-top:10px;
}

/* LOGIN */

.auth-section{
  min-height:85vh;
  display:flex;
  justify-content:center;
  align-items:center;
  position:relative;
  padding:40px 20px;
  overflow:hidden;
}

.auth-glow{
  position:absolute;
  width:420px;
  height:420px;
  background:#ffd700;
  opacity:0.08;
  filter:blur(120px);
  border-radius:50%;
}

.auth-card{
  width:100%;
  max-width:440px;
  background:linear-gradient(180deg,rgba(21,21,21,0.96),rgba(8,8,8,0.96));
  border:1px solid #2a2a2a;
  border-radius:20px;
  padding:42px;
  position:relative;
  z-index:1;
  box-shadow:0 25px 70px rgba(0,0,0,0.65);
  backdrop-filter:blur(5px);
}

.auth-icon{
  width:62px;
  height:62px;
  border-radius:50%;
  background:rgba(255,215,0,0.12);
  color:#ffd700;
  display:flex;
  justify-content:center;
  align-items:center;
  margin:0 auto 20px;
  font-size:26px;
}

.auth-card h1{
  text-align:center;
  font-size:34px;
  margin-bottom:10px;
}

.auth-card > p{
  text-align:center;
  color:#aaa;
  margin-bottom:30px;
}

.auth-card form{
  display:flex;
  flex-direction:column;
  gap:12px;
}

.auth-card label{
  font-size:14px;
  color:#d6d6d6;
  font-weight:700;
}

.auth-card input{
  width:100%;
  padding:15px 16px;
  border-radius:10px;
  border:1px solid #2d2d2d;
  background:#050505;
  color:white;
  outline:none;
}

.auth-card input:focus{
  border-color:#ffd700;
  box-shadow:0 0 0 3px rgba(255,215,0,0.08);
}

.auth-btn{
  width:100%;
  border:none;
  margin-top:10px;
}

.auth-bottom{
  margin-top:24px;
  margin-bottom:0 !important;
  font-size:14px;
}

.auth-bottom a{
  color:#ffd700;
  text-decoration:none;
  font-weight:700;
}

/* DASHBOARD */

.dashboard-hero{
  min-height:280px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  text-align:center;
  position:relative;
  overflow:hidden;
  padding:40px 20px;
}

.dashboard-hero h1{
  font-size:64px;
  font-weight:900;
}

.dashboard-hero span{
  color:#ffd700;
}

.dashboard-hero p{
  color:#bbb;
  margin-top:15px;
  font-size:18px;
}

.dashboard-grid{
  max-width:1150px;
  margin:0 auto;
  padding:40px 28px 100px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}

.dash-card{
  background:linear-gradient(180deg,rgba(21,21,21,0.96),rgba(8,8,8,0.96));
  border:1px solid #2a2a2a;
  border-radius:20px;
  padding:35px;
  min-height:260px;
  box-shadow:0 25px 70px rgba(0,0,0,0.55);
  transition:0.25s;
  backdrop-filter:blur(5px);
}

.dash-card:hover{
  transform:translateY(-8px);
  border-color:#ffd700;
}

.dash-card h3{
  font-size:24px;
  margin:15px 0;
}

.dash-card p{
  color:#bbb;
  margin-bottom:25px;
}

.progress-bar{
  width:100%;
  height:12px;
  background:#222;
  border-radius:30px;
  overflow:hidden;
  margin-top:25px;
}

.progress-fill{
  width:25%;
  height:100%;
  background:#ffd700;
}

/* AI */

.ai-section{
  min-height:85vh;
  max-width:950px;
  margin:0 auto;
  padding:60px 20px 100px;
  position:relative;
}

.ai-header{
  text-align:center;
  margin-bottom:35px;
}

.ai-header h1{
  font-size:64px;
  font-weight:900;
}

.ai-header span{
  color:#ffd700;
}

.ai-header p{
  color:#bbb;
  margin-top:12px;
}

.chat-box{
  background:linear-gradient(180deg,rgba(21,21,21,0.96),rgba(7,7,7,0.96));
  border:1px solid #2a2a2a;
  border-radius:22px;
  padding:30px;
  box-shadow:0 25px 70px rgba(0,0,0,0.65);
  backdrop-filter:blur(5px);
}

.message{
  padding:18px;
  border-radius:14px;
  margin-bottom:18px;
  max-width:75%;
}

.message p{
  color:#ddd;
  margin-top:8px;
}

.message.ai{
  background:#111;
  border:1px solid #2a2a2a;
}

.message.user{
  background:rgba(255,215,0,0.12);
  border:1px solid rgba(255,215,0,0.35);
  margin-left:auto;
}

.chat-input{
  display:flex;
  gap:12px;
  margin-top:25px;
}

.chat-input input{
  flex:1;
  padding:16px;
  border-radius:10px;
  border:1px solid #333;
  background:#050505;
  color:white;
  outline:none;
}

.chat-input input:focus{
  border-color:#ffd700;
}

.chat-input button{
  border:none;
}

/* PHONE */

@media(max-width:800px){
  .navbar{
    flex-direction:column;
    gap:18px;
  }

  .navbar nav{
    gap:16px;
    flex-wrap:wrap;
    justify-content:center;
  }

  .hero h1{
    font-size:58px;
  }

  .features,
  .course-grid,
  .dashboard-grid{
    grid-template-columns:1fr;
  }

  .dashboard-hero h1,
  .ai-header h1{
    font-size:42px;
  }

  .chat-input{
    flex-direction:column;
  }

  .message{
    max-width:100%;
  }
}