@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root{
  --main:#6366f1;
  --second:#8b5cf6;
  --accent:#06b6d4;
  --dark:#0f172a;
  --light:#f8fafc;
}

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

body{
  background:linear-gradient(135deg,#eef2ff,#f8fafc);
  color:#1e293b;
}

/* Header */

.header{
  background:linear-gradient(135deg,var(--main),var(--second));
  color:white;
  text-align:center;
  padding:80px 20px;
  position:relative;
  overflow:hidden;
}

.header::after{
  content:"";
  position:absolute;
  inset:0;
  background:url("https://www.transparenttextures.com/patterns/diamond-upholstery.png");
  opacity:.15;
}

.header h1{
  font-size:2.8rem;
  font-weight:700;
}

.header p{
  margin-top:12px;
  font-size:1.1rem;
  opacity:.9;
}

/* Main */

.main{
  padding:60px 15px;
}

/* Grid */

.grid{
  max-width:1150px;
  margin:auto;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:30px;
}

/* Cards */

.card{
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(8px);
  padding:30px 25px;
  border-radius:20px;
  text-decoration:none;
  color:#1e293b;
  box-shadow:0 10px 25px rgba(0,0,0,.08);
  transition:.35s ease;
  position:relative;
  overflow:hidden;
}

.card::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,var(--main),var(--accent));
  opacity:0;
  transition:.35s;
}

.card:hover::before{
  opacity:.12;
}

.card:hover{
  transform:translateY(-12px) scale(1.02);
  box-shadow:0 20px 40px rgba(0,0,0,.18);
}

.card h3{
  font-size:1.3rem;
  margin-bottom:8px;
  color:var(--main);
  position:relative;
}

.card p{
  font-size:.95rem;
  opacity:.8;
  position:relative;
}

/* AI Button */

#ai-btn{
  position:fixed;
  bottom:25px;
  right:25px;
  width:60px;
  height:60px;
  background:linear-gradient(135deg,var(--main),var(--second));
  color:white;
  border:none;
  border-radius:50%;
  font-size:26px;
  cursor:pointer;
  box-shadow:0 8px 20px rgba(0,0,0,.25);
  transition:.25s;
}

#ai-btn:hover{
  transform:scale(1.1);
}

/* AI Box */

#ai-box{
  position:fixed;
  bottom:100px;
  right:25px;
  width:320px;
  background:white;
  border-radius:18px;
  box-shadow:0 20px 40px rgba(0,0,0,.25);
  display:none;
  overflow:hidden;
}

.ai-head{
  background:linear-gradient(135deg,var(--main),var(--second));
  color:white;
  padding:12px 15px;
  display:flex;
  justify-content:space-between;
  font-weight:600;
}

#ai-msg{
  height:230px;
  overflow:auto;
  padding:12px;
  font-size:14px;
}

#ai-msg p{
  margin-bottom:8px;
}

#ai-text{
  width:100%;
  padding:10px;
  border:none;
  border-top:1px solid #e2e8f0;
  outline:none;
}

/* Footer */

footer{
  background:linear-gradient(135deg,var(--dark),#020617);
  color:white;
  text-align:center;
  padding:30px 15px;
  margin-top:60px;
  font-size:.9rem;
}

/* Mobile */

@media(max-width:768px){

  .header h1{font-size:2.1rem;}

  .grid{gap:20px;}

  #ai-box{width:90%;}
}
/* ===== HERO SECTION ===== */

.hero{
  min-height:90vh;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:60px 10%;
  background:linear-gradient(135deg,#4f46e5,#06b6d4);
  color:white;
  overflow:hidden;
}

.hero-content{
  max-width:550px;
  animation:slideLeft 1s ease;
}

.hero-content h1{
  font-size:3rem;
  font-weight:700;
  line-height:1.2;
}

.hero-content p{
  margin:20px 0;
  font-size:1.1rem;
  opacity:.9;
}

.hero-btns{
  margin-top:25px;
}

.btn-primary,
.btn-secondary{
  display:inline-block;
  padding:12px 28px;
  border-radius:30px;
  text-decoration:none;
  font-weight:500;
  margin-right:12px;
  transition:.3s;
}

.btn-primary{
  background:white;
  color:#4f46e5;
}

.btn-primary:hover{
  background:#eef2ff;
}

.btn-secondary{
  border:2px solid white;
  color:white;
}

.btn-secondary:hover{
  background:white;
  color:#4f46e5;
}

/* Hero Image */

.hero-image{
  max-width:450px;
  animation:slideRight 1s ease;
}

.hero-image img{
  width:100%;
  border-radius:20px;
  box-shadow:0 15px 35px rgba(0,0,0,.25);
}

/* ===== FEATURES ===== */

.features{
  padding:80px 10%;
  background:#f8fafc;
  text-align:center;
}

.features h2{
  font-size:2.4rem;
  margin-bottom:40px;
  color:#1e293b;
}

.feature-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:25px;
}

.feature-card{
  background:white;
  padding:30px 25px;
  border-radius:18px;
  box-shadow:0 6px 15px rgba(0,0,0,.08);
  transition:.3s;
}

.feature-card:hover{
  transform:translateY(-8px);
  box-shadow:0 15px 30px rgba(0,0,0,.15);
}

.feature-card h3{
  margin-bottom:10px;
  color:#4f46e5;
}

/* ===== ANIMATIONS ===== */

@keyframes slideLeft{
  from{opacity:0;transform:translateX(-50px);}
  to{opacity:1;transform:translateX(0);}
}

@keyframes slideRight{
  from{opacity:0;transform:translateX(50px);}
  to{opacity:1;transform:translateX(0);}
}

/* ===== MOBILE ===== */

@media(max-width:900px){

  .hero{
    flex-direction:column;
    text-align:center;
  }

  .hero-image{
    margin-top:40px;
  }

  .hero-content h1{
    font-size:2.3rem;
  }

}
/* ===== NAVBAR ===== */

.navbar{
  background:white;
  padding:15px 8%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  box-shadow:0 2px 10px rgba(0,0,0,.1);
  position:sticky;
  top:0;
  z-index:999;
}

.logo{
  font-size:1.5rem;
  font-weight:700;
  color:var(--main);
}

.nav-links{
  list-style:none;
  display:flex;
  gap:25px;
}

.nav-links li a{
  text-decoration:none;
  color:#1e293b;
  font-weight:500;
  transition:.2s;
}

.nav-links li a:hover{
  color:var(--main);
}

/* Search Box */

.search-box{
  display:flex;
  background:#f1f5f9;
  border-radius:30px;
  overflow:hidden;
}

.search-box input{
  border:none;
  padding:7px 12px;
  outline:none;
  background:transparent;
  width:150px;
}

.search-box button{
  border:none;
  background:var(--main);
  color:white;
  padding:6px 12px;
  cursor:pointer;
}

/* Mobile Navbar */

@media(max-width:900px){

  .navbar{
    flex-direction:column;
    gap:10px;
  }

  .nav-links{
    flex-wrap:wrap;
    justify-content:center;
  }

}
/* Quick Access */

.quick{
  padding:60px 10%;
  text-align:center;
}

.quick h2{
  margin-bottom:25px;
}

.quick-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:20px;
}

.quick-grid a{
  background:linear-gradient(135deg,var(--main),var(--accent));
  color:white;
  padding:18px;
  border-radius:15px;
  text-decoration:none;
  font-weight:500;
  transition:.3s;
}

.quick-grid a:hover{
  transform:scale(1.05);
}
/* Language Switch */

.lang-switch{
  display:flex;
  gap:8px;
}

.lang-switch button{
  border:none;
  padding:5px 10px;
  border-radius:6px;
  background:#e0e7ff;
  color:#4f46e5;
  cursor:pointer;
  font-weight:500;
  transition:.2s;
}

.lang-switch button:hover{
  background:#4f46e5;
  color:white;
}
/* Voice Assistant Button */

.voice-btn{
  border:none;
  background:linear-gradient(135deg,#22c55e,#16a34a);
  color:white;
  padding:6px 14px;
  border-radius:20px;
  font-weight:500;
  cursor:pointer;
  transition:.3s;
}

.voice-btn:hover{
  transform:scale(1.05);
  opacity:.9;
}
/* ===== STUDY PLANNER ===== */

.planner{
  padding:70px 10%;
  background:linear-gradient(135deg,#eef2ff,#ecfeff);
  text-align:center;
}

.planner h2{
  font-size:2rem;
  margin-bottom:10px;
  color:#1e293b;
}

.planner p{
  color:#475569;
  margin-bottom:30px;
}

/* Input Box */

.planner-box{
  display:flex;
  justify-content:center;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:30px;
}

.planner-box input{
  padding:10px 14px;
  border-radius:8px;
  border:1px solid #c7d2fe;
  outline:none;
  width:180px;
}

.planner-box button{
  background:#4f46e5;
  color:white;
  border:none;
  padding:10px 18px;
  border-radius:8px;
  cursor:pointer;
  transition:.3s;
}

.planner-box button:hover{
  background:#4338ca;
}

/* Task List */

#taskList{
  list-style:none;
  max-width:500px;
  margin:auto;
}

#taskList li{
  background:white;
  padding:12px 15px;
  margin-bottom:10px;
  border-radius:10px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  box-shadow:0 2px 6px rgba(0,0,0,.08);
  animation:fadeIn .4s;
}

#taskList span{
  font-weight:500;
}

#taskList button{
  background:#ef4444;
  color:white;
  border:none;
  border-radius:6px;
  padding:4px 8px;
  cursor:pointer;
  font-size:.8rem;
}

@keyframes fadeIn{
  from{opacity:0;transform:translateY(5px)}
  to{opacity:1;transform:translateY(0)}
}
/* Reminder Button */

.remind-btn{
  background:linear-gradient(135deg,#f59e0b,#f97316);
  color:white;
  border:none;
  padding:10px 18px;
  border-radius:8px;
  cursor:pointer;
  font-weight:500;
  transition:.3s;
}

.remind-btn:hover{
  transform:scale(1.05);
  opacity:.9;
}