/* =============================================
   PHOTO SELECT STUDIO - Design System
   Theme: Organic Professionalism
   Style: Modern Minimalist with Tactile Accents
   ============================================= */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* --- Design Tokens --- */
:root {
  /* Primary - Deep Sage */
  --primary: #5E7D60;
  --primary-hover: #527052;
  --primary-active: #476246;
  --primary-light: #7A9A7C;
  --primary-lighter: #A3BEA5;
  --primary-50: #EEF3EE;
  --primary-100: #D5E1D6;

  /* Secondary - Earthy Charcoal */
  --secondary: #2E2E2B;
  --secondary-light: #4A4A46;
  --secondary-lighter: #6B6B66;

  /* Accent - Sand */
  --accent: #F0EBE1;
  --accent-dark: #E3DCD0;
  --accent-darker: #D4CBBC;

  /* Backgrounds */
  --bg-primary: #F8F6F1;
  --bg-secondary: #F2EDE4;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FDFCFA;
  --bg-overlay: rgba(46, 46, 43, 0.6);
  --bg-overlay-dark: rgba(46, 46, 43, 0.85);

  /* Text */
  --text-primary: #2E2E2B;
  --text-secondary: #6B6B66;
  --text-muted: #9A9A94;
  --text-inverse: #F8F6F1;
  --text-on-primary: #FFFFFF;

  /* Borders */
  --border-light: #E8E4DC;
  --border: #D4CBBC;
  --border-dark: #B8AFA0;

  /* Status Colors */
  --success: #5E7D60;
  --success-bg: #EEF3EE;
  --warning: #C4A35A;
  --warning-bg: #FBF5E6;
  --danger: #B85454;
  --danger-bg: #FBEAEA;
  --info: #5A8FC4;
  --info-bg: #EAF0F8;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(46, 46, 43, 0.04);
  --shadow-sm: 0 1px 4px rgba(46, 46, 43, 0.06), 0 1px 2px rgba(46, 46, 43, 0.04);
  --shadow-md: 0 4px 12px rgba(46, 46, 43, 0.08), 0 2px 4px rgba(46, 46, 43, 0.04);
  --shadow-lg: 0 8px 24px rgba(46, 46, 43, 0.10), 0 4px 8px rgba(46, 46, 43, 0.04);
  --shadow-xl: 0 16px 48px rgba(46, 46, 43, 0.14), 0 8px 16px rgba(46, 46, 43, 0.06);
  --shadow-primary: 0 4px 14px rgba(94, 125, 96, 0.30);

  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Typography */
  --font-sans: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Outfit', 'Inter', -apple-system, sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 0.9375rem;
  --text-lg: 1.0625rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.5rem;

  /* Font Weights */
  --weight-light: 300;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;

  /* Z-index */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

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

[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
}

/* Subtle background texture */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(94, 125, 96, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(94, 125, 96, 0.02) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(212, 203, 188, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-in-out);
}

a:hover {
  color: var(--primary-hover);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--text-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-3xl); letter-spacing: -0.015em; }
h3 { font-size: var(--text-2xl); letter-spacing: -0.01em; }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }

/* --- Utility Classes --- */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-weight: var(--weight-medium);
  font-size: var(--text-sm);
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-in-out);
}

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

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-sm), var(--shadow-primary);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-md), 0 6px 20px rgba(94, 125, 96, 0.35);
  transform: translateY(-1px);
}

.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(0) scale(0.97);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--danger);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-danger:hover {
  background: #a44848;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--accent);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  width: 36px;
  height: 36px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.card-body {
  padding: var(--space-6);
}

/* Inputs */
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--duration-fast) var(--ease-in-out);
  outline: none;
}

.input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-50);
}

.input::placeholder {
  color: var(--text-muted);
}

.input-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  line-height: 1.5;
}

.badge-primary {
  background: var(--primary-50);
  color: var(--primary);
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

/* Toasts */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-left: 3px solid var(--primary);
  pointer-events: auto;
  animation: toast-in var(--duration-slow) var(--ease-out);
  max-width: 380px;
}

.toast.toast-success { border-left-color: var(--success); }
.toast.toast-warning { border-left-color: var(--warning); }
.toast.toast-danger { border-left-color: var(--danger); }

.toast-exit {
  animation: toast-out var(--duration-normal) var(--ease-in-out) forwards;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-dark);
}

/* Selection */
::selection {
  background: var(--primary-100);
  color: var(--text-primary);
}

/* Loading Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 2.5px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  text-align: center;
}

.empty-state svg {
  width: 64px;
  height: 64px;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.empty-state p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  max-width: 320px;
}

/* --- Animations --- */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(100%) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateX(100%) scale(0.95);
  }
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes checkBounce {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.25rem;
  }

  .toast-container {
    top: auto;
    bottom: var(--space-6);
    right: var(--space-4);
    left: var(--space-4);
  }

  .toast {
    max-width: 100%;
  }
}

/* ————————————————————————————————
   BRAND LOGO
   ———————————————————————————————— */
.brand-logo {
  object-fit: contain;
  vertical-align: middle;
}

.login-logo-img {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
}

.navbar-logo-img {
  width: 24px;
  height: 24px;
  margin-right: var(--space-2);
}

.gallery-header__brand-icon.brand-logo {
  width: 24px;
  height: 24px;
  margin-right: var(--space-2);
}

.loading-logo-img {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-3);
}