/* ============================================
   Viking Technology - Authentication Page Styles
   Custom CSS Template | BEM Naming Convention
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Brand Colors */
  --vt-brand-primary: #2457c5;
  --vt-brand-primary-dark: #1d46a3;
  --vt-brand-gradient-start: #102941;
  --vt-brand-gradient-mid: #09264b;
  --vt-brand-gradient-end: #061b34;
  --vt-brand-accent: rgba(18, 83, 169, 0.3);

  /* Neutral Colors */
  --vt-color-white: #ffffff;
  --vt-color-black: #0b1b31;
  --vt-color-gray-100: #f8f9fb;
  --vt-color-gray-200: #e1e5eb;
  --vt-color-gray-300: #ccc;
  --vt-color-gray-500: #626b7a;
  --vt-color-gray-600: #a0a8b6;

  /* Semantic Colors */
  --vt-color-success: #10b981;
  --vt-color-info: #f0f7ff;
  --vt-color-info-border: #d0e3ff;

  /* Typography */
  --vt-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --vt-font-weight-regular: 400;
  --vt-font-weight-medium: 500;
  --vt-font-weight-semibold: 600;
  --vt-font-weight-bold: 700;

  /* Spacing */
  --vt-spacing-xs: 4px;
  --vt-spacing-sm: 8px;
  --vt-spacing-md: 16px;
  --vt-spacing-lg: 24px;
  --vt-spacing-xl: 32px;
  --vt-spacing-2xl: 48px;
  --vt-spacing-3xl: 64px;

  /* Border Radius */
  --vt-radius-sm: 6px;
  --vt-radius-md: 8px;
  --vt-radius-lg: 12px;
  --vt-radius-xl: 16px;
  --vt-radius-full: 9999px;

  /* Shadows */
  --vt-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --vt-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --vt-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --vt-transition-fast: 150ms ease;
  --vt-transition-base: 200ms ease;
  --vt-transition-slow: 300ms ease;

  /* Layout */
  --vt-container-max-width: 1280px;
  --vt-form-max-width: 480px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--vt-font-family);
  font-weight: var(--vt-font-weight-regular);
  color: var(--vt-color-black);
  background: var(--vt-color-white);
  line-height: 1.6;
  min-height: 100vh;
}

/* --- Authentication Layout --- */
.vt-auth {
  display: grid;
  grid-template-columns: 0.44fr 0.56fr;
  min-height: 100vh;
}

/* --- Left Panel (Decorative) --- */
.vt-auth__sidebar {
  background: linear-gradient(
    160deg,
    var(--vt-brand-gradient-start) 0%,
    var(--vt-brand-gradient-mid) 50%,
    var(--vt-brand-gradient-end) 100%
  );
  color: var(--vt-color-white);
  padding: var(--vt-spacing-2xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* Dot Pattern Overlay */
.vt-auth__sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px
  );
  background-size: 24px 24px;
  pointer-events: none;
}

/* Decorative Element */
.vt-auth__decoration {
  position: relative;
  width: 280px;
  height: 280px;
  margin-bottom: var(--vt-spacing-2xl);
}

.vt-auth__decoration-ring {
  position: absolute;
  border-radius: var(--vt-radius-full);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.vt-auth__decoration-ring--outer {
  inset: 0;
}

.vt-auth__decoration-ring--middle {
  inset: 30px;
  border-color: rgba(255, 255, 255, 0.12);
}

.vt-auth__decoration-ring--inner {
  inset: 60px;
  border-color: rgba(255, 255, 255, 0.16);
}

.vt-auth__decoration-icon {
  position: absolute;
  inset: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: rgba(255, 255, 255, 0.6);
}

/* Trust Badges */
.vt-auth__badges {
  display: flex;
  flex-direction: column;
  gap: var(--vt-spacing-lg);
  position: relative;
  z-index: 1;
}

.vt-auth__badge {
  display: flex;
  align-items: center;
  gap: var(--vt-spacing-md);
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}

.vt-auth__badge-icon {
  font-size: 20px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--vt-radius-md);
}

/* --- Right Panel (Form) --- */
.vt-auth__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--vt-spacing-2xl);
  background: var(--vt-color-white);
}

.vt-auth__form-wrapper {
  width: 100%;
  max-width: var(--vt-form-max-width);
}

.vt-auth__title {
  font-size: 28px;
  font-weight: var(--vt-font-weight-semibold);
  color: var(--vt-color-black);
  margin-bottom: var(--vt-spacing-sm);
}

.vt-auth__subtitle {
  font-size: 15px;
  color: var(--vt-color-gray-500);
  margin-bottom: var(--vt-spacing-xl);
  line-height: 1.5;
}

/* Security Banner */
.vt-auth__notice {
  display: flex;
  align-items: center;
  gap: var(--vt-spacing-sm);
  padding: var(--vt-spacing-md);
  background: var(--vt-color-info);
  border: 1px solid var(--vt-color-info-border);
  border-radius: var(--vt-radius-md);
  font-size: 13px;
  color: var(--vt-brand-primary);
  margin-bottom: var(--vt-spacing-lg);
}

/* --- Form Elements --- */
.vt-form__group {
  margin-bottom: var(--vt-spacing-lg);
}

.vt-form__label {
  display: block;
  font-size: 14px;
  font-weight: var(--vt-font-weight-medium);
  color: var(--vt-color-black);
  margin-bottom: var(--vt-spacing-xs);
}

.vt-form__input {
  width: 100%;
  padding: 12px var(--vt-spacing-md);
  font-family: var(--vt-font-family);
  font-size: 15px;
  color: var(--vt-color-black);
  background: var(--vt-color-gray-100);
  border: 1px solid var(--vt-color-gray-200);
  border-radius: var(--vt-radius-md);
  outline: none;
  transition: all var(--vt-transition-base);
}

.vt-form__input:focus {
  border-color: var(--vt-brand-primary);
  box-shadow: 0 0 0 3px rgba(36, 87, 197, 0.1);
  background: var(--vt-color-white);
}

.vt-form__input::placeholder {
  color: var(--vt-color-gray-600);
}

/* --- Buttons --- */
.vt-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--vt-spacing-sm);
  width: 100%;
  padding: 14px var(--vt-spacing-lg);
  font-family: var(--vt-font-family);
  font-size: 15px;
  font-weight: var(--vt-font-weight-semibold);
  border: none;
  border-radius: var(--vt-radius-md);
  cursor: pointer;
  transition: all var(--vt-transition-base);
  text-decoration: none;
}

.vt-btn--primary {
  background: var(--vt-brand-primary);
  color: var(--vt-color-white);
}

.vt-btn--primary:hover {
  background: var(--vt-brand-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--vt-shadow-md);
}

.vt-btn--secondary {
  background: var(--vt-color-white);
  color: var(--vt-color-black);
  border: 1px solid var(--vt-color-gray-200);
  margin-bottom: var(--vt-spacing-lg);
}

.vt-btn--secondary:hover {
  background: var(--vt-color-gray-100);
  border-color: var(--vt-color-gray-300);
}

/* --- Divider --- */
.vt-divider {
  display: flex;
  align-items: center;
  gap: var(--vt-spacing-md);
  margin: var(--vt-spacing-lg) 0;
  font-size: 13px;
  color: var(--vt-color-gray-500);
}

.vt-divider::before,
.vt-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--vt-color-gray-200);
}

/* --- Links --- */
.vt-auth__link {
  display: block;
  text-align: center;
  font-size: 14px;
  color: var(--vt-brand-primary);
  text-decoration: none;
  margin-bottom: var(--vt-spacing-lg);
}

.vt-auth__link:hover {
  text-decoration: underline;
}

.vt-auth__footer {
  text-align: center;
  font-size: 14px;
  color: var(--vt-color-gray-500);
  margin-top: var(--vt-spacing-lg);
}

.vt-auth__footer a {
  color: var(--vt-brand-primary);
  text-decoration: none;
  font-weight: var(--vt-font-weight-medium);
}

.vt-auth__footer a:hover {
  text-decoration: underline;
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
  .vt-auth {
    grid-template-columns: 1fr;
  }

  .vt-auth__sidebar {
    display: none;
  }

  .vt-auth__content {
    min-height: 100vh;
  }
}

@media (max-width: 640px) {
  .vt-auth__content {
    padding: var(--vt-spacing-lg);
  }

  .vt-auth__title {
    font-size: 24px;
  }
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --vt-color-white: #0f172a;
    --vt-color-black: #e2e8f0;
    --vt-color-gray-100: #1e293b;
    --vt-color-gray-200: #334155;
    --vt-color-gray-500: #94a3b8;
    --vt-color-gray-600: #64748b;
  }
}