/* ==============================
   SIS AUTH – MODERN COMPACT UI
   ============================== */

:root {
  /* Color System */
  --sis-bg: #f6f8fb;
  --sis-card: #ffffff;
  --sis-border: #e5e7eb;
  --sis-text: #0f172a;
  --sis-text-secondary: #64748b;
  --sis-brand: #1FAB89;
  --sis-brand-hover: #159e7d;
  --sis-danger: #ef4444;
  --sis-danger-hover: #dc2626;
  --sis-danger-bg: #fff5f5;
  --sis-danger-border: #fecaca;
  
  /* Spacing */
  --sis-space-xs: 6px;
  --sis-space-sm: 12px;
  --sis-space-md: 16px;
  --sis-space-lg: 20px;
  --sis-space-xl: 24px;
  
  /* Typography */
  --sis-font-size-xs: 12px;
  --sis-font-size-sm: 13px;
  --sis-font-size-base: 14px;
  --sis-font-size-md: 15px;
  --sis-font-size-lg: 20px;
  --sis-font-size-xl: 22px;
  
  /* Effects */
  --sis-radius-sm: 8px;
  --sis-radius-md: 10px;
  --sis-radius-lg: 14px;
  --sis-radius-xl: 16px;
  --sis-shadow-sm: 0 4px 14px rgba(0,0,0,.12);
  --sis-shadow-md: 0 10px 30px rgba(0,0,0,.06);
  --sis-shadow-lg: 0 20px 40px rgba(0,0,0,.25);
  --sis-shadow-brand: 0 8px 20px rgba(31,171,137,.25);
  --sis-focus-ring: 0 0 0 3px rgba(31,171,137,.15);
  
  /* Transitions */
  --sis-transition-fast: 0.1s ease;
  --sis-transition-base: 0.2s ease;
  --sis-transition-slow: 0.3s ease;
}

/* ==============================
   BASE & RESET
   ============================== */

.sis-auth-container * {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.sis-auth-container button,
.sis-auth-container input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* ==============================
   LAYOUT
   ============================== */

.sis-auth-container {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sis-space-xl) var(--sis-space-md);
  background: var(--sis-bg);
}

.sis-card {
  width: 100%;
  max-width: 420px;
  background: var(--sis-card);
  border: 1px solid var(--sis-border);
  border-radius: var(--sis-radius-lg);
  box-shadow: var(--sis-shadow-md);
  overflow: hidden;
}

/* ==============================
   FORM STRUCTURE
   ============================== */

.sis-form {
  padding: 26px var(--sis-space-xl);
}

.sis-form-header {
  text-align: center;
  margin-bottom: 22px;
}

.sis-form-header h1 {
  font-size: var(--sis-font-size-xl);
  font-weight: 700;
  color: var(--sis-text);
  margin-bottom: var(--sis-space-xs);
  line-height: 1.3;
}

.sis-form-header p {
  font-size: var(--sis-font-size-base);
  color: var(--sis-text-secondary);
  line-height: 1.5;
}

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

.sis-form-label {
  display: block;
  font-size: var(--sis-font-size-sm);
  font-weight: 600;
  margin-bottom: var(--sis-space-xs);
  color: var(--sis-text);
}

/* ==============================
   FORM CONTROLS
   ============================== */

.sis-form-input {
  width: 100%;
  padding: 14px;
  border-radius: var(--sis-radius-md);
  border: 1px solid var(--sis-border);
  font-size: var(--sis-font-size-md);
  background: var(--sis-card);
  transition: 
    border-color var(--sis-transition-base),
    box-shadow var(--sis-transition-base),
    background-color var(--sis-transition-base);
}

.sis-form-input:focus {
  outline: none;
  border-color: var(--sis-brand);
  box-shadow: var(--sis-focus-ring);
}

.sis-form-input::placeholder {
  color: var(--sis-text-secondary);
  opacity: 0.7;
}

/* Password Input Group */
.sis-password-group {
  position: relative;
  display: flex;
  align-items: center;
}

.sis-password-group .sis-form-input {
  padding-right: 48px;
}

.sis-password-toggle {
  position: absolute;
  right: 14px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--sis-text-secondary);
  padding: 8px;
  margin: -8px;
  border-radius: var(--sis-radius-sm);
  transition: 
    color var(--sis-transition-base),
    background-color var(--sis-transition-base);
}

.sis-password-toggle:hover {
  color: var(--sis-text);
  background-color: rgba(0, 0, 0, 0.05);
}

.sis-password-toggle:active {
  transform: translateY(1px);
}

/* ==============================
   BUTTONS
   ============================== */

.sis-btn {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--sis-radius-md);
  border: 0;
  background: var(--sis-brand);
  color: #fff;
  font-weight: 700;
  font-size: var(--sis-font-size-md);
  cursor: pointer;
  transition: 
    background-color var(--sis-transition-base),
    transform var(--sis-transition-fast),
    box-shadow var(--sis-transition-base);
}

.sis-btn:hover {
  background: var(--sis-brand-hover);
  box-shadow: var(--sis-shadow-brand);
}

.sis-btn:active {
  transform: translateY(1px);
}

.sis-btn:focus-visible {
  outline: none;
  box-shadow: var(--sis-focus-ring);
}

/* Button Variants */
.sis-btn-danger {
  background: var(--sis-danger);
}

.sis-btn-danger:hover {
  background: var(--sis-danger-hover);
}

.sis-btn-light {
  background: #f3f4f6;
  color: var(--sis-text);
}

.sis-btn-light:hover {
  background: #e5e7eb;
  box-shadow: var(--sis-shadow-sm);
}

/* ==============================
   GOOGLE OAUTH BUTTON
   ============================== */

.sis-google-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px 16px;
  background: #ffffff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: var(--sis-radius-md);
  font-size: var(--sis-font-size-md);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: 
    background-color var(--sis-transition-base),
    border-color var(--sis-transition-base),
    box-shadow var(--sis-transition-base),
    transform var(--sis-transition-fast);
}

.sis-google-btn:hover {
  background: #f8f9fa;
  border-color: #c6c9ce;
  box-shadow: var(--sis-shadow-sm);
}

.sis-google-btn:active {
  transform: translateY(1px);
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}

.sis-google-btn:focus-visible {
  outline: none;
  box-shadow: 
    0 0 0 3px rgba(66,133,244,.35),
    var(--sis-shadow-sm);
}

.sis-google-btn img {
  width: 18px;
  height: 18px;
}

/* ==============================
   UTILITY COMPONENTS
   ============================== */

.sis-link {
  color: var(--sis-brand);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--sis-transition-base);
}

.sis-link:hover {
  color: var(--sis-brand-hover);
  text-decoration: underline;
}

.sis-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 18px 0;
  font-size: var(--sis-font-size-sm);
  color: var(--sis-text-secondary);
}

.sis-divider::before,
.sis-divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--sis-border);
}

.sis-divider::before {
  margin-right: var(--sis-space-md);
}

.sis-divider::after {
  margin-left: var(--sis-space-md);
}

/* ==============================
   TOGGLE SECTIONS
   ============================== */

.sis-toggle-btn {
  width: 100%;
  padding: var(--sis-space-sm) 14px;
  border-radius: var(--sis-radius-md);
  border: 1px solid var(--sis-border);
  background: #f9fafb;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: 
    background-color var(--sis-transition-base),
    border-color var(--sis-transition-base);
  margin: 10px 0;    
}

.sis-toggle-btn:hover {
  background: #eef2f7;
}

.sis-toggle-btn:active {
  transform: translateY(1px);
}

.sis-toggle-section {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: 
    max-height var(--sis-transition-slow),
    opacity var(--sis-transition-base),
    margin var(--sis-transition-base);
}

.sis-toggle-section.is-open {
  max-height: 500px;
  opacity: 1;
  margin-top: var(--sis-space-sm);
}

/* Danger Variant */
.sis-danger-toggle {
  color: var(--sis-danger);
  border-color: var(--sis-danger-border);
  background: var(--sis-danger-bg);
}

.sis-danger-toggle:hover {
  background: #fee2e2;
}

/* ==============================
   MODAL
   ============================== */

.sis-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sis-space-md);
  animation: modalFadeIn var(--sis-transition-base);
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    backdrop-filter: blur(0px);
  }
  to {
    opacity: 1;
    backdrop-filter: blur(4px);
  }
}

.sis-modal::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  animation: overlayFadeIn var(--sis-transition-base);
}

@keyframes overlayFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.sis-modal.hidden {
  display: none;
}

.sis-modal-box {
  position: relative;
  background: var(--sis-card);
  border-radius: var(--sis-radius-lg);
  padding: var(--sis-space-xl);
  max-width: 380px;
  width: 100%;
  z-index: 1;
  text-align: center;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.sis-modal-box h3 {
  font-size: var(--sis-font-size-lg);
  color: var(--sis-text);
  margin-bottom: var(--sis-space-xs);
  line-height: 1.4;
}

.sis-modal-box p {
  color: var(--sis-text-secondary);
  line-height: 1.5;
}

.sis-modal-actions {
  margin-top: var(--sis-space-lg);
  display: flex;
  gap: var(--sis-space-sm);
}

/* ==============================
   RESPONSIVE DESIGN
   ============================== */

@media (max-width: 480px) {
  :root {
    --sis-space-xl: 22px;
    --sis-space-lg: 18px;
  }
  
  .sis-auth-container {
    padding: 20px var(--sis-space-sm);
  }
  
  .sis-card {
    border-radius: var(--sis-radius-xl);
  }
  
  .sis-form {
    padding: var(--sis-space-xl) var(--sis-space-lg);
  }
  
  .sis-form-header h1 {
    font-size: var(--sis-font-size-lg);
  }
  
  .sis-form-header p {
    font-size: var(--sis-font-size-sm);
  }
  
  .sis-form-input {
    font-size: 16px; /* Prevents iOS zoom */
    padding: 15px 14px;
  }
  
  .sis-password-toggle {
    right: var(--sis-space-sm);
    font-size: 18px;
  }
  
  .sis-btn,
  .sis-toggle-btn,
  .sis-google-btn {
    padding: 15px 16px;
    border-radius: var(--sis-radius-md);
  }
  
  .sis-divider {
    margin: var(--sis-space-md) 0;
  }
  
  .sis-modal {
    padding: var(--sis-space-sm);
  }
  
  .sis-modal-box {
    padding: var(--sis-space-xl) var(--sis-space-lg);
    border-radius: var(--sis-radius-xl);
  }
  
  .sis-modal-actions {
    flex-direction: column;
    gap: var(--sis-space-xs);
  }
}

/* ==============================
   DARK MODE SUPPORT (optional)
   ============================== */

@media (prefers-color-scheme: dark) {
  :root {
    --sis-bg: #0f172a;
    --sis-card: #1e293b;
    --sis-border: #334155;
    --sis-text: #f1f5f9;
    --sis-text-secondary: #94a3b8;
    --sis-danger-bg: #450a0a;
    --sis-danger-border: #7f1d1d;
  }
  
  .sis-form-input {
    background: #1e293b;
    color: var(--sis-text);
    border-color: var(--sis-border);
  }
  
  .sis-form-input::placeholder {
    color: var(--sis-text-secondary);
  }
  
  .sis-toggle-btn {
    background: #1e293b;
  }
  
  .sis-toggle-btn:hover {
    background: #334155;
  }
  
  .sis-password-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .sis-google-btn {
    background: #1e293b;
    color: #e2e8f0;
    border-color: #475569;
  }
  
  .sis-google-btn:hover {
    background: #334155;
    border-color: #64748b;
  }
}

/* ==============================
   PROFILE EDIT LAYOUT
   ============================== */

/* Grid layout for profile page */
.sis-auth-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sis-space-xl);
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

/* Danger zone styling */
.sis-danger-zone {
  width: 100%;
  max-width: 420px;
  margin-top: var(--sis-space-md);
}

.sis-danger-zone .sis-toggle-section {
  background: var(--sis-danger-bg);
  border: 1px solid var(--sis-danger-border);
  border-radius: var(--sis-radius-md);
  padding: var(--sis-space-lg);
  margin-top: var(--sis-space-sm);
}

.sis-danger-zone p {
  color: var(--sis-danger);
  font-size: var(--sis-font-size-sm);
  line-height: 1.5;
  margin-bottom: var(--sis-space-md);
  text-align: center;
}

.sis-delete-form {
  padding: 0;
  margin-top: var(--sis-space-md);
}

.sis-confirm-text {
  background: #fee2e2;
  color: var(--sis-danger);
  padding: 2px 6px;
  border-radius: var(--sis-radius-sm);
  font-family: monospace;
  font-weight: bold;
}

/* Horizontal rule */
.sis-hr {
  height: 1px;
  background: var(--sis-border);
  margin: var(--sis-space-xl) 0;
  width: 100%;
}

/* Modal specific adjustments */
.sis-modal-actions .sis-btn {
  width: auto;
  flex: 1;
  min-width: 120px;
}

/* Responsive adjustments */
@media (max-width: 480px) {
  .sis-auth-grid {
    gap: var(--sis-space-lg);
  }
  
  .sis-danger-zone .sis-toggle-section {
    padding: var(--sis-space-md);
  }
  
  .sis-modal-actions .sis-btn {
    width: 100%;
  }
}

/* ==============================
   CONSENT TEXT (LOGIN)
   ============================== */

.sis-consent-text {
  margin-top: 10px;
  text-align: center;
  font-size: var(--sis-font-size-xs);
  color: var(--sis-text-secondary);
  line-height: 1.5;
}

.sis-consent-text a {
  color: var(--sis-brand);
  font-weight: 600;
  text-decoration: none;
}

.sis-consent-text a:hover {
  color: var(--sis-brand-hover);
  text-decoration: underline;
}