/* ===== Reset ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  min-height: 100%;
}

body {
  font-family: 'Cairo', sans-serif;
  color: white;
  background: url("../images/bg-animation.svg") center / cover no-repeat fixed;
}

/* ===== NAVBAR ===== */
.navbar {
  height: 80px;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 60px;

  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
}

.nav-logos {
  display: flex;
  align-items: center;
  gap: 15px;
}

.nav-logos img {
  height: 55px;
}

.nav-logos span {
  font-size: 36px;
  color: #ff0008;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 700;
  transition: 0.3s;
}

.nav-links a:hover {
  color: #c4161c;
}

.nav-links .active {
  color: #c4161c;
  font-weight: 900;
}

/* ===== HAMBURGER MENU ===== */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 5px;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 3px;
  background: white;
  border-radius: 10px;
  transition: 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* ===== BOOKING WRAPPER ===== */
.booking {
  max-width: 1000px;
  margin: 110px auto 60px;
  padding: 60px 30px;

  background: rgba(0, 0, 0, 0.65);
  border-radius: 35px;
}

/* ===== TITLE ===== */
.booking h2 {
  text-align: center;
  margin-bottom: 40px;
  color: #ff2d2d;
  font-size: 32px;
}

/* ===== FORM GRID ===== */
#bookingForm {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

/* ===== INPUTS & SELECTS ===== */
#bookingForm input,
#bookingForm select {
  font-family: 'Poppins', 'Cairo', sans-serif;
  padding: 14px 16px;
  font-size: 15px;

  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.2);
  outline: none;

  background: rgba(0, 0, 0, 0.55);
  color: white;
  text-align: center;
}

/* Placeholder */
#bookingForm input::placeholder {
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 1px;
  text-align: center;
}

/* Focus */
#bookingForm input:focus,
#bookingForm select:focus {
  border-color: #ff2d2d;
  box-shadow: 0 0 10px rgba(255,45,45,0.5);
}

/* Select arrow */
#bookingForm select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;

  background-image: url("data:image/svg+xml,%3Csvg fill='white' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 15px center;
  padding-left: 45px;
}

/* Dropdown options */
#bookingForm select option {
  background: #fff;
  color: #000;
}

/* ===== HIDDEN ===== */
.hidden {
  display: none;
}

/* ===== SUBJECTS ===== */
#subjectsBox {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

#subjectsBox label {
  background: rgba(255,255,255,0.1);
  padding: 10px 15px;
  border-radius: 10px;
  cursor: pointer;
}

/* ===== TEACHERS ===== */
#teachersContainer {
  grid-column: 1 / -1;
  margin-top: 30px;
}

.subject-box {
  margin-bottom: 30px;
  padding: 20px;
  background: rgba(0,0,0,0.6);
  border-radius: 15px;
}

.subject-title {
  font-size: 22px;
  margin-bottom: 15px;
  color: #ff2d2d;
}

.optional-box {
  margin-bottom: 20px;
}

.option-card {
  background: #0f172a;
  padding: 10px;
  margin: 5px 0;
  border-radius: 10px;
  cursor: pointer;
  transition: .3s;
}

.option-card:hover {
  border: 1px solid #38bdf8;
}

.option-card.active {
  background: #38bdf8;
  color: #000;
}

.teachers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 15px;
}

.teacher-card {
  background: rgba(255,255,255,0.08);
  padding: 12px;
  border-radius: 10px;

  display: flex;
  gap: 10px;
  align-items: center;
  cursor: pointer;
  transition: 0.3s;
}

.teacher-card:hover {
  background: rgba(255,45,45,0.25);
}

.teacher-card input {
  transform: scale(1.2);
}

.selected-subjects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  margin-bottom: 25px;
}

.subject-top-box {
  background: #1e293b;
  border-radius: 15px;
  padding: 15px;
  border: 1px solid #334155;
}

.subject-top-box h4 {
  margin-bottom: 10px;
}

.selected-name {
  background: #020617;
  padding: 10px;
  border-radius: 10px;
  min-height: 35px;
}

/* المدرسين */
.teacher-card {
  background: #0f172a;
  padding: 10px;
  border-radius: 10px;
  margin: 5px 0;
  cursor: pointer;
  transition: .3s;
}

.teacher-card:hover {
  border: 1px solid #38bdf8;
}

.teacher-card.active {
  background: #38bdf8;
  color: #000;
}

/* ===== SUBMIT BUTTON ===== */
#bookingForm button {
  grid-column: 1 / -1;
  margin-top: 40px;
  padding: 16px;

  font-size: 18px;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  letter-spacing: 1.5px;

  border-radius: 60px;
  border: none;
  background: linear-gradient(135deg, #c4161c, #ff2d2d);
  color: white;

  cursor: pointer;
  transition: all 0.3s ease;
}

#bookingForm button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px rgba(255,45,45,0.6);
}

/* ===== FOOTER ===== */
footer {
  background: #000;
  padding: 20px;
  text-align: center;
  font-size: 16px;
}

footer a {
  color: #c4161c;
  text-decoration: none;
  font-family: 'Poppins', sans-serif;
}

/* ===== Error Styles ===== */
.input-error {
  border-color: #ff2d2d !important;
  box-shadow: 0 0 10px rgba(255,45,45,0.6);
  animation: shake 0.35s;
}

.error-message {
  color: #ff2d2d;
  font-size: 14px;
  margin-top: 6px;
  text-align: center;
}

/* Shake animation */
@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  50% { transform: translateX(5px); }
  75% { transform: translateX(-5px); }
  100% { transform: translateX(0); }
}

/* ===== MEDIA QUERIES ===== */

/* Tablet */
@media (max-width: 992px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 80px;
    right: -100%;
    width: 280px;
    height: calc(100vh - 80px);
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 40px;
    gap: 25px;
    transition: 0.4s ease;
    border-left: 2px solid rgba(255, 45, 45, 0.3);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 20px;
    padding: 10px 20px;
    width: 100%;
    text-align: center;
  }

  .booking {
    margin: 100px 15px 40px;
    padding: 30px 20px;
  }

  #bookingForm {
    grid-template-columns: 1fr 1fr;
  }

  #subjectsBox {
    grid-column: 1 / -1;
  }

  #teachersContainer {
    grid-column: 1 / -1;
  }

  #bookingForm button {
    grid-column: 1 / -1;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .navbar {
    height: 70px;
    padding: 0 20px;
  }

  .nav-logos img {
    height: 40px;
  }

  .nav-logos span {
    font-size: 24px;
  }

  .nav-links {
    top: 70px;
    height: calc(100vh - 70px);
    width: 260px;
  }

  .nav-links a {
    font-size: 18px;
  }

  .booking {
    margin: 85px 10px 30px;
    padding: 20px 15px;
    border-radius: 20px;
  }

  .booking h2 {
    font-size: 24px;
    margin-bottom: 25px;
  }

  #bookingForm {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  #bookingForm input,
  #bookingForm select {
    padding: 12px 14px;
    font-size: 14px;
  }

  #subjectsBox {
    grid-column: 1 / -1;
  }

  #subjectsBox label {
    padding: 8px 12px;
    font-size: 14px;
  }

  #teachersContainer {
    grid-column: 1 / -1;
  }

  .teachers-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .teacher-card {
    padding: 10px;
    font-size: 14px;
  }

  .selected-subjects {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  #bookingForm button {
    grid-column: 1 / -1;
    padding: 14px;
    font-size: 16px;
    margin-top: 25px;
  }

  footer {
    padding: 15px;
    font-size: 14px;
  }
}

/* Small Phones */
@media (max-width: 480px) {
  .navbar {
    padding: 0 15px;
  }

  .nav-logos img {
    height: 32px;
  }

  .nav-logos span {
    font-size: 20px;
  }

  .nav-links {
    width: 220px;
  }

  .nav-links a {
    font-size: 16px;
    padding: 8px 15px;
  }

  .booking h2 {
    font-size: 20px;
  }

  .teachers-grid {
    grid-template-columns: 1fr;
  }
}