/* ===========================================
   style.css - Buku Tamu Digital Kampus
   Modern, Responsif & Efek 3D Halus
   =========================================== */

/* ======= Warna Utama & Variabel ======= */
:root {
  --primary: #ec2929;
  --glass: rgba(255, 255, 255, 0.6);
  --dark: #0e0f0f;
  --text-light: #f0f0f0;

  /* Override warna Bootstrap */
  --bs-primary: #ec2929 !important;
  --bs-link-color: #ec2929 !important;
  --bs-link-hover-color: #b71c1c !important;
}

/* ======= Global Layout ======= */
body {
  font-family: 'Poppins', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: linear-gradient(135deg, #eef0f3, #fcfdfe);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ======= Navbar ======= */
.navbar {
  background: linear-gradient(90deg, var(--primary), #d81e1e);
  color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  border-bottom: 2px solid rgba(255, 255, 255, 0.15);
}

.navbar-brand {
  font-weight: 600;
  color: #fff !important;
  display: flex;
  align-items: center;
  gap: 10px;
}

.navbar-brand img {
  height: 45px;
  border-radius: 6px;
  background-color: #fff;
  padding: 3px;
}

.navbar h4 {
  font-weight: 600;
  color: #fff;
}

.navbar small {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ======= Running Text ======= */
.marquee {
  overflow: hidden;
  white-space: nowrap;
  color: var(--primary);
  font-weight: 600;
  font-size: 1.3rem;
  margin: 10px 0;
  animation: marquee 15s linear infinite;
}

@keyframes marquee {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

/* ======= Main Layout ======= */
main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 30px 15px;
}

/* ======= Card Form ======= */
.form-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  padding: 30px;
  max-width: 600px;
  width: 100%;
  animation: fadeIn 1s ease;
}

.form-label {
  font-weight: 500;
}

/* ======= Button ======= */
.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--primary));
  border: none;
  transition: 0.3s;
}

.btn-primary:hover {
  background: linear-gradient(90deg, var(--dark), var(--dark));
  transform: translateY(-2px);
}

/* ======= Efek 3D & Glass ======= */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(6px) saturate(120%);
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(13, 110, 253, 0.08);
}

.hover-3d {
  transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s;
  transform: perspective(800px) translateZ(0);
}

.hover-3d:hover {
  transform: perspective(800px) translateY(-8px) rotateX(2deg) rotateY(-2deg) scale(1.01);
  box-shadow: 0 18px 40px rgba(10, 10, 40, 0.08);
}

/* ======= Footer ======= */
footer {
  color: #fff;
  background: var(--primary);
  padding: 10px;
  font-size: 0.9rem;
  text-align: center;
}

/* ======= Animasi FadeIn ======= */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ======= Halaman Submit (Terima Kasih) ======= */
.thank-page {
  background: linear-gradient(135deg, #f8f9fa, #ffffff);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thank-box {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  padding: 40px;
  text-align: center;
  animation: fadeIn 0.8s ease;
}

.thank-box h1 {
  color: var(--primary);
  font-weight: 700;
  font-size: 2.2rem;
}

.thank-box p {
  font-size: 1.1rem;
  margin-top: 10px;
}

.btn-red {
  background-color: var(--primary);
  border: none;
  color: white;
  transition: 0.3s;
}

.btn-red:hover {
  background-color: #b71c1c;
  transform: translateY(-2px);
}

.emoji {
  font-size: 3rem;
  display: block;
  margin-bottom: 15px;
}

/* ======= Responsiveness ======= */
@media (max-width: 767px) {
  .hover-3d:hover {
    transform: none;
    box-shadow: none;
  }
  .navbar-brand img {
    height: 35px;
  }
  .navbar h4 {
    font-size: 1rem;
  }
  .thank-box {
    padding: 25px;
  }
}
/* ======= Halaman Login Admin ======= */
.login-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
  padding: 40px 30px;
  width: 100%;
  max-width: 420px;
  text-align: center;
  animation: fadeIn 0.8s ease;
}

.login-card h4 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 20px;
}

.form-control {
  border-radius: 10px;
  padding: 10px 15px;
}

.btn-red {
  background: var(--primary);
  border: none;
  color: #fff;
  padding: 10px;
  border-radius: 10px;
  font-weight: 500;
  transition: 0.3s;
}

.btn-red:hover {
  background: var(--dark);
  transform: translateY(-2px);
}

.alert {
  border-radius: 10px;
}

.footer-note {
  font-size: 0.85rem;
  color: #6c757d;
  margin-top: 15px;
}
/* ======= Layout Tengah Halaman Login ======= */
body.login-page {
  background: linear-gradient(135deg, #f8f9fa, #ffffff);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Poppins', sans-serif;
}
/* ===========================================
   Login Page Styling - Buku Tamu Digital Kampus
   =========================================== */
.login-page {
  background: linear-gradient(135deg, #f8f9fa, #ffffff);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Poppins', sans-serif;
}

.login-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 8px 25px rgba(223, 220, 220, 0.504);
  padding: 40px 30px;
  width: 100%;
  max-width: 420px;
  text-align: center;
  animation: fadeIn 0.8s ease;
}

.login-logo {
  width: 80px;
  height: 80px;
  border-radius: 10px;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.login-card h4 {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 20px;
}

.form-control {
  border-radius: 10px;
  padding: 10px 15px;
}

.btn-red {
  background: var(--primary);
  border: none;
  color: #fff;
  padding: 10px;
  border-radius: 10px;
  font-weight: 500;
  transition: 0.3s;
}

.btn-red:hover {
  background: var(--dark);
  transform: translateY(-2px);
}

.footer-note {
  font-size: 0.85rem;
  color: #6c757d;
  margin-top: 15px;
}