@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --font-primary: 'Inter', 'Roboto', sans-serif;

  --primary-glow: hsl(257, 100%, 75%);
  --primary: hsl(257, 100%, 65%);
  --primary-dark: hsl(257, 100%, 55%);
  --accent-glow: hsl(327, 100%, 75%);
  --accent: hsl(327, 100%, 65%);

  --text-primary: hsl(240, 20%, 95%);
  --text-secondary: hsl(240, 10%, 70%);

  --bg-dark: hsl(240, 25%, 6%);
  --bg-med: hsl(240, 20%, 10%);
  --bg-light: hsl(240, 15%, 15%);

  --border-color: hsl(240, 10%, 25%);
  --success: hsl(122, 55%, 50%);
  --warning: hsl(45, 100%, 60%);
  --error: hsl(350, 85%, 60%);

  --container-width: 800px;
  --base-spacing: 1rem;
  --fluid-header-size: clamp(2rem, 5vw, 3rem);
  --fluid-text-size: clamp(0.9rem, 1.5vw, 1rem);

  --shadow-sm: 0 4px 15px hsla(0, 0%, 0%, 0.2);
  --shadow-md: 0 8px 30px hsla(257, 100%, 65%, 0.2);
  --shadow-lg: 0 10px 40px hsla(257, 100%, 65%, 0.35);
  --border-radius: 8px;
  --transition-fast: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-med: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-dark);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(to right, hsla(257, 100%, 65%, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, hsla(257, 100%, 65%, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: -1;
  animation: bg-pan 30s linear infinite;
}

@keyframes bg-pan {
  0% { background-position: 0% 0%; }
  100% { background-position: 100% 100%; }
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--base-spacing) calc(var(--base-spacing) * 2);
    background: var(--bg-med);
    border-bottom: 1px solid var(--border-color);
}

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

nav .logo span {
    color: var(--primary);
}

nav ul {
    list-style: none;
    display: flex;
    gap: calc(var(--base-spacing) * 1.5);
}

nav ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

nav ul li a:hover {
    color: var(--primary-glow);
}

.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-dark);
  display: grid;
  place-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
  transition-delay: 0.2s;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.container {
  max-width: var(--container-width);
  margin: clamp(4rem, 10vh, 6rem) auto;
  padding: calc(var(--base-spacing) * 2);
  background: var(--bg-med);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

header {
  text-align: center;
  margin-bottom: calc(var(--base-spacing) * 2.5);
}

header h1 {
  font-size: var(--fluid-header-size);
  font-weight: 700;
  background: -webkit-linear-gradient(135deg, var(--primary-glow), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 25px hsla(257, 100%, 65%, 0.2);
  margin-bottom: calc(var(--base-spacing) / 2);
}

header p {
  font-size: var(--fluid-text-size);
  color: var(--text-secondary);
  max-width: 60ch;
  margin: 0 auto;
}

.form-group {
  margin-bottom: calc(var(--base-spacing) * 1.5);
}

label {
  display: block;
  margin-bottom: calc(var(--base-spacing) / 2);
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

input[type="text"],
input[type="email"],
input[type="number"],
select {
  width: 100%;
  padding: calc(var(--base-spacing) * 0.9) calc(var(--base-spacing) * 1.2);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--fluid-text-size);
  transition: var(--transition-fast);
  background-color: var(--bg-light);
  color: var(--text-primary);
  font-family: inherit;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px hsla(257, 100%, 65%, 0.25);
  outline: none;
  background-color: var(--bg-med);
}

input[type="file"] {
  display: none;
}

.file-upload-label {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: calc(var(--base-spacing) * 2);
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--text-secondary);
  font-weight: 500;
  text-align: center;
}

.file-upload-label:hover {
  border-color: var(--primary);
  color: var(--primary-glow);
  background-color: hsla(257, 100%, 65%, 0.05);
}

.file-upload-label.file-selected {
    border-color: var(--success);
    color: var(--success);
    background-color: hsla(122, 55%, 50%, 0.05);
    border-style: solid;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23e0e0e0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 15px center;
  background-size: 18px;
}

.submit-button {
  display: inline-block;
  width: 100%;
  padding: calc(var(--base-spacing) * 1.1) calc(var(--base-spacing) * 2);
  background-image: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-med);
  box-shadow: var(--shadow-md);
  text-align: center;
  text-decoration: none;
}

.submit-button:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

.submit-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  filter: none;
}

.alert {
  padding: var(--base-spacing);
  border-radius: var(--border-radius);
  font-size: 1rem;
  color: var(--text-primary);
  border: 1px solid transparent;
}

.alert-warning {
  background: hsla(45, 100%, 60%, 0.1);
  border-color: var(--warning);
}

@media (max-width: 768px) {
  .container {
    margin: clamp(2rem, 5vh, 4rem) auto;
    padding: var(--base-spacing);
  }

  header h1 {
    font-size: calc(var(--fluid-header-size) * 0.9);
  }
}