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

/* BASE */
body {
  font-family: "Geist", system-ui, sans-serif;
  background: #0a0a0d;
  color: #eaeaea;
  min-height: 100vh;
}

/* PARTICLES */
#particles-js {
  position: fixed;
  inset: 0;
  z-index: -1;
}

/* WRAPPER */
.app-wrapper {
  max-width: 780px;
  margin: 6rem auto;
  padding: 3rem;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(14px);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.04);
}

/* HEADERS */
h1 {
  font-size: 2.6rem;
  letter-spacing: -0.04em;
}

.subtitle {
  margin-top: 0.75rem;
  margin-bottom: 2.5rem;
  color: #bcbcbc;
  font-size: 0.95rem;
}

/* FORM */
form {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

label {
  font-size: 0.8rem;
  color: #cfcfcf;
}

/* INPUTS */
input,
textarea,
select {
  background: #000;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  font-size: 0.85rem;
  transition: all 0.25s ease;
}

/* TEXTAREA */
textarea {
  min-height: 90px;
  resize: vertical;
}

/* FOCUS */
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25);
}

/* CUSTOM SELECT */
select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, white 50%),
    linear-gradient(135deg, white 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 55%,
    calc(100% - 12px) 55%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  cursor: pointer;
}

/* OPTIONS */
option {
  background: #000;
  color: #fff;
}

/* SUBMIT BUTTON */
.submit-btn {
  margin-top: 1.5rem;
  padding: 0.9rem;
  border-radius: 14px;
  background: transparent;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
}

/* UNDERGLOW */
.submit-btn::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 16px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.15);
}

.submit-btn:hover::after {
  opacity: 1;
}

/* MOBILE */
@media (max-width: 600px) {
  .app-wrapper {
    margin: 3rem 1rem;
    padding: 2rem;
  }
}