/**
 * Intently - Main Stylesheet
 * Modern, mobile-first dating app design
 * 
 * Color palette:
 * - Primary: Rose/Coral (#E11D48, #F43F5E)
 * - Background: Warm cream (#FFF5F5, #FFFBFB)
 * - Text: Slate (#1E293B, #64748B)
 * - Accent: Gold (#F59E0B)
 */

/* ==========================================================================
   CSS Variables
   ========================================================================== */

:root {
  /* Colors */
  --color-primary: #E11D48;
  --color-primary-light: #F43F5E;
  --color-primary-dark: #BE123C;
  
  --color-secondary: #F59E0B;
  --color-secondary-light: #FBBF24;
  
  --color-bg: #FFFBFB;
  --color-bg-card: #FFFFFF;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);
  
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-text-muted: #94A3B8;
  --color-text-inverse: #FFFFFF;
  
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  
  --color-success: #10B981;
  --color-error: #EF4444;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;
  
  /* Intent zone colors */
  --color-casual: #F43F5E;
  --color-dating: #EC4899;
  --color-serious: #8B5CF6;
  --color-marriage: #06B6D4;
  --color-sugar: #F59E0B;
  --color-travel: #10B981;
  --color-lifestyle: #6366F1;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Z-index */
  --z-dropdown: 100;
  --z-modal: 200;
  --z-toast: 300;
  --z-nav: 50;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-primary { color: var(--color-primary); }
.text-center { text-align: center; }

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding-bottom: 80px; /* Space for bottom nav */
}

.main-content {
  flex: 1;
  padding: var(--space-4) 0;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

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

.btn-ghost:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}

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

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--radius-full);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.1);
}

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

.form-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-1);
}

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

.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-body {
  padding: var(--space-4);
}

/* Profile Card (Discovery) */
.profile-card {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.profile-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  padding: var(--space-6) var(--space-4) var(--space-4);
  color: var(--color-text-inverse);
}

.profile-card-name {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.profile-card-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.profile-card-badges {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* ==========================================================================
   Badges
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-text-inverse);
}

.badge-verified {
  background: var(--color-info);
}

.badge-premium {
  background: var(--color-secondary);
}

.intent-badge {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.intent-badge.casual { background: var(--color-casual); color: white; }
.intent-badge.dating { background: var(--color-dating); color: white; }
.intent-badge.serious { background: var(--color-serious); color: white; }
.intent-badge.marriage { background: var(--color-marriage); color: white; }
.intent-badge.sugar { background: var(--color-sugar); color: white; }
.intent-badge.travel { background: var(--color-travel); color: white; }
.intent-badge.lifestyle { background: var(--color-lifestyle); color: white; }

/* ==========================================================================
   Bottom Navigation
   ========================================================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-2) 0;
  padding-bottom: max(var(--space-2), env(safe-area-inset-bottom));
  z-index: var(--z-nav);
}

.bottom-nav-inner {
  display: flex;
  justify-content: space-around;
  max-width: 480px;
  margin: 0 auto;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.nav-item.active {
  color: var(--color-primary);
}

.nav-item svg {
  width: 24px;
  height: 24px;
}

.nav-item span {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.nav-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  min-width: 18px;
  height: 18px;
  padding: 0 var(--space-1);
  font-size: 10px;
  font-weight: 600;
  color: white;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Action Buttons (Like/Pass)
   ========================================================================== */

.action-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-4) 0;
}

.action-btn {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.action-btn:hover {
  transform: scale(1.05);
}

.action-btn:active {
  transform: scale(0.95);
}

.action-btn-pass {
  background: var(--color-bg-card);
  color: var(--color-text-muted);
}

.action-btn-like {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
}

.action-btn-super {
  background: linear-gradient(135deg, var(--color-info), #60A5FA);
  color: white;
}

.action-btn svg {
  width: 28px;
  height: 28px;
}

/* ==========================================================================
   Match List
   ========================================================================== */

.match-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.match-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
}

.match-item:hover {
  background: var(--color-border-light);
}

.match-avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.match-info {
  flex: 1;
  min-width: 0;
}

.match-name {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.match-preview {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.match-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.match-unread {
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Chat
   ========================================================================== */

.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border-light);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.message {
  max-width: 80%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-base);
}

.message-sent {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

.message-received {
  align-self: flex-start;
  background: var(--color-bg-card);
  color: var(--color-text);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.message-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
  text-align: right;
}

.chat-input-container {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border-light);
}

.chat-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: var(--color-border-light);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
}

.chat-input:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary);
}

.chat-send-btn {
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Modal
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  padding: var(--space-6);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
}

.modal-close:hover {
  background: var(--color-border-light);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast-container {
  position: fixed;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: calc(100% - var(--space-8));
  max-width: 400px;
}

.toast {
  padding: var(--space-3) var(--space-4);
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: toast-in 0.3s ease;
}

.toast.success { background: var(--color-success); }
.toast.error { background: var(--color-error); }
.toast.warning { background: var(--color-warning); }

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

.skeleton {
  background: linear-gradient(90deg, var(--color-border-light) 25%, var(--color-border) 50%, var(--color-border-light) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

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

/* ==========================================================================
   Utilities
   ========================================================================== */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.p-4 { padding: var(--space-4); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

.w-full { width: 100%; }
.h-full { height: 100%; }

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

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

.hidden { display: none; }
.block { display: block; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.relative { position: relative; }
.absolute { position: absolute; }

/* ==========================================================================
   Auth Pages
   ========================================================================== */

.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
}

.auth-logo {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-logo h1 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-logo p {
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

.auth-form {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

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

.auth-footer {
  text-align: center;
  margin-top: var(--space-6);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.auth-footer a {
  color: var(--color-primary);
  font-weight: 500;
}

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

@media (min-width: 768px) {
  .container {
    max-width: 540px;
  }
  
  .modal {
    border-radius: var(--radius-2xl);
    margin: var(--space-4);
  }
}

/* Safe area insets for notched devices */
@supports (padding: max(0px)) {
  .app-layout {
    padding-top: max(0px, env(safe-area-inset-top));
    padding-bottom: max(80px, calc(80px + env(safe-area-inset-bottom)));
  }
}