/* ========================================
   SpinPro Design System v1.0
   Neon Colors + Professional Polish
   Base: 8px Grid System
   ======================================== */

:root {
  /* Primary Neon Colors */
  --color-cyan: #00FFC8;
  --color-cyan-bright: #00ffdb;
  --color-cyan-dark: #00f0c0;
  --color-cyan-light: #00ffc814;
  --color-cyan-medium: #00ffc826;
  --color-cyan-strong: #00ffc866;
  --color-cyan-glow: rgba(0, 255, 200, 0.15);

  --color-green: #39FF14;
  --color-green-dark: #2bb904;
  --color-green-light: #39ff1414;
  --color-green-glow: rgba(57, 255, 20, 0.1);

  --color-navy: #0a0e27;
  --color-navy-light: #1a1f3a;
  --color-navy-lighter: #2a2f4a;

  --color-gold: #C9980B;
  --color-gold-light: rgba(201, 152, 11, 0.1);

  --color-white: #FFFFFF;
  --color-gray-light: #e8e9f0;
  --color-gray-medium: #1a1f3a;
  --color-gray-dark: #0a0e27;

  --color-error: #FF6B6B;
  --color-error-light: rgba(255, 107, 107, 0.1);

  /* Spacing Grid (8px base) */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Courier New", monospace;

  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-xxl: 24px;

  --line-height-tight: 1.4;
  --line-height-normal: 1.6;
  --line-height-loose: 1.8;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.2);
  --shadow-cyan-md: 0 4px 12px rgba(0, 255, 200, 0.15);
  --shadow-cyan-lg: 0 12px 32px rgba(0, 255, 200, 0.12);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-quick: 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-normal: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-slow: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 500;
  --z-fixed: 600;
  --z-modal-backdrop: 999;
  --z-modal: 1000;
  --z-popover: 1100;
  --z-tooltip: 1200;
}

/* ========================================
   Global Styles
   ======================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-navy);
  background: var(--color-white);
  transition: background-color var(--transition-normal);
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-sm);
}

h1 {
  font-size: var(--font-size-xxl);
  color: var(--color-navy);
}

h2 {
  font-size: var(--font-size-xl);
  color: var(--color-navy);
}

h3 {
  font-size: var(--font-size-lg);
  color: var(--color-navy);
}

h4, h5, h6 {
  font-size: var(--font-size-base);
  color: var(--color-navy);
}

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--transition-quick);
}

a:hover {
  color: var(--color-cyan-bright);
  text-decoration: underline;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-cyan);
  background: transparent;
  color: var(--color-cyan);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-quick);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  gap: var(--space-xs);
}

.btn:hover {
  background: var(--color-cyan-light);
  box-shadow: var(--shadow-cyan-md);
  transform: translateY(-2px);
}

.btn:active {
  background: var(--color-cyan-medium);
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Button Primary */
.btn.btn-primary {
  background: var(--color-cyan);
  color: var(--color-navy);
  border-color: var(--color-cyan);
  font-weight: var(--font-weight-semibold);
}

.btn.btn-primary:hover {
  background: var(--color-cyan-bright);
  box-shadow: 0 6px 16px rgba(0, 255, 200, 0.25);
  color: var(--color-navy);
}

.btn.btn-primary:active {
  background: var(--color-cyan-dark);
  transform: scale(0.98);
}

/* Button Secondary */
.btn.btn-secondary {
  border-color: var(--color-gray-light);
  color: var(--color-navy);
}

.btn.btn-secondary:hover {
  background: var(--color-gray-light);
  border-color: var(--color-gray-light);
}

/* Button Small */
.btn.btn-sm {
  height: 32px;
  padding: 0 var(--space-sm);
  font-size: var(--font-size-sm);
}

/* Button Large */
.btn.btn-lg {
  height: 48px;
  padding: 0 var(--space-lg);
  font-size: var(--font-size-lg);
}

/* Button Loading State */
.btn.is-loading {
  color: transparent;
}

.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid var(--color-cyan-light);
  border-top-color: var(--color-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========================================
   Form Elements
   ======================================== */

.form-group {
  margin-bottom: var(--space-md);
}

label {
  display: block;
  color: var(--color-navy);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-xs);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
textarea,
select {
  width: 100%;
  height: 40px;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-navy-light);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-navy);
  background: var(--color-white);
  transition: all var(--transition-quick);
}

textarea {
  height: auto;
  min-height: 100px;
  padding: var(--space-sm);
  resize: vertical;
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder,
input[type="number"]::placeholder,
textarea::placeholder {
  color: var(--color-navy-light);
  opacity: 0.6;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
textarea:focus,
select:focus {
  border: 2px solid var(--color-cyan);
  box-shadow: 0 0 0 4px rgba(0, 255, 200, 0.12);
  background: rgba(0, 255, 200, 0.02);
  outline: none;
}

/* Form Validation */
input.is-valid,
textarea.is-valid {
  border: 2px solid var(--color-green);
  background: rgba(57, 255, 20, 0.05);
}

input.is-valid:focus,
textarea.is-valid:focus {
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.1);
}

input.is-error,
textarea.is-error {
  border: 2px solid var(--color-error);
  background: rgba(255, 107, 107, 0.05);
}

input.is-error:focus,
textarea.is-error:focus {
  box-shadow: 0 0 0 4px rgba(255, 107, 107, 0.1);
  border-color: var(--color-error);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-xs);
  margin-top: var(--space-xxs);
  display: flex;
  align-items: center;
  gap: var(--space-xxs);
  animation: slideInError var(--transition-quick) forwards;
}

@keyframes slideInError {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-success {
  color: var(--color-green);
  font-size: var(--font-size-xs);
  margin-top: var(--space-xxs);
  display: flex;
  align-items: center;
  gap: var(--space-xxs);
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--color-cyan);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  box-shadow: inset 0 0 8px rgba(0, 255, 200, 0.2);
}

.card:hover {
  border-color: rgba(0, 255, 200, 0.6);
  box-shadow: var(--shadow-cyan-lg);
  transform: translateY(-4px);
}

.card:hover::before {
  box-shadow: inset 0 0 12px rgba(0, 255, 200, 0.4);
}

.card-title {
  color: var(--color-navy);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-sm) 0;
}

.card-text {
  color: var(--color-navy-light);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  margin: 0 0 var(--space-sm) 0;
}

.card-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-gray-light);
  display: flex;
  gap: var(--space-xs);
}

/* ========================================
   Modals & Overlays
   ======================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 39, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-white);
  border: 2px solid var(--color-cyan);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 600px;
  width: 90vw;
  z-index: var(--z-modal);
  overflow: hidden;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.85);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: auto;
}

.modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-cyan);
}

.modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-gray-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  margin: 0;
  color: var(--color-navy);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--color-navy-light);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-quick);
  border-radius: var(--radius-md);
}

.modal-close:hover {
  background: rgba(0, 255, 200, 0.08);
  color: var(--color-cyan);
  transform: rotate(90deg);
}

.modal-content {
  padding: var(--space-lg);
  max-height: calc(90vh - 200px);
  overflow-y: auto;
}

.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-gray-light);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-xs);
}

/* ========================================
   Containers & Layout
   ======================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-sm {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-lg) 0;
}

.section-title {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-cyan);
}

/* ========================================
   Grid & Flex Utilities
   ======================================== */

.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.flex {
  display: flex;
  gap: var(--space-md);
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
}

.flex-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* ========================================
   Loading & States
   ======================================== */

.spinner {
  border: 3px solid rgba(0, 255, 200, 0.2);
  border-top: 3px solid var(--color-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
}

.spinner-md {
  width: 40px;
  height: 40px;
}

.spinner-lg {
  width: 60px;
  height: 60px;
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-light) 25%,
    rgba(0, 255, 200, 0.1) 50%,
    var(--color-gray-light) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  .container,
  .container-sm {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-md) 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .modal {
    max-width: 95vw;
    width: 95vw;
  }

  h1 {
    font-size: var(--font-size-xl);
  }

  h2 {
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 480px) {
  :root {
    --space-md: 12px;
    --space-lg: 16px;
  }

  .btn {
    height: 36px;
    padding: 0 var(--space-sm);
  }

  .flex {
    flex-direction: column;
  }

  .flex-between {
    flex-direction: column;
    align-items: flex-start;
  }

  .modal-footer {
    flex-direction: column;
  }

  .modal-footer .btn {
    width: 100%;
  }
}

/* ========================================
   Utility Classes
   ======================================== */

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.px-md { padding: 0 var(--space-md); }
.py-md { padding: var(--space-md) 0; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.text-cyan { color: var(--color-cyan); }
.text-green { color: var(--color-green); }
.text-error { color: var(--color-error); }
.text-muted { color: var(--color-navy-light); }

.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }

.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

.hidden { display: none !important; }
.invisible { visibility: hidden; }

.rounded { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.transition { transition: all var(--transition-normal); }

/* ========================================
   Accessibility
   ======================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 4px;
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
  body {
    background: white;
    color: black;
  }

  .btn,
  .modal-backdrop,
  .spinner {
    display: none;
  }
}