/* ===================================
   The Great Jesus Rally - Main Styles
   Native App-like Mobile Experience
   =================================== */

/* === CSS Custom Properties (Design System) === */
:root {
  /* Colors - iOS/Android friendly palette */
  --primary-color: #0A84FF; /* iOS blue - dark mode optimized */
  --primary-hover: #3396FF;
  --primary-active: #0056CC;
  --secondary-color: #5E5CE6; /* iOS purple - dark mode optimized */
  --success-color: #32D74B; /* iOS green - dark mode optimized */
  --error-color: #FF453A; /* iOS red - dark mode optimized */
  --warning-color: #FF9F0A; /* iOS orange - dark mode optimized */
  
  /* Dark theme as default */
  --background-color: #000000; /* True black for OLED */
  --surface-color: #1C1C1E; /* Dark surface */
  --surface-secondary: #2C2C2E; /* Darker surface */
  --border-color: #38383A; /* Dark borders */
  --border-color-light: #38383A;
  --text-primary: #FFFFFF; /* White text */
  --text-secondary: #EBEBF5; /* Light gray text */
  --text-tertiary: #8E8E93; /* Medium gray text */
  --text-placeholder: #6D6D70; /* Placeholder text */
  
  /* Typography - San Francisco inspired */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  --font-size-4xl: 32px;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Shadows - native app-like */
  --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 -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* === Light Theme === */
[data-theme="light"] {
  /* Override with light theme colors */
  --primary-color: #007AFF;
  --primary-hover: #0056CC;
  --secondary-color: #5856D6;
  --success-color: #34C759;
  --error-color: #FF3B30;
  --warning-color: #FF9500;
  
  --background-color: #F2F2F7;
  --surface-color: #FFFFFF;
  --surface-secondary: #F9F9F9;
  --border-color: #C7C7CC;
  --border-color-light: #E5E5EA;
  --text-primary: #000000;
  --text-secondary: #3C3C43;
  --text-tertiary: #8E8E93;
  --text-placeholder: #C7C7CD;
}

/* === Reset & Base === */
* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  margin: 0;
  padding: 0;
  background-color: var(--background-color);
  color: var(--text-primary);
  -webkit-overflow-scrolling: touch;
}

/* === Container & Layout === */
.container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

/* === Header === */
.header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  z-index: 0;
}

.header > * {
  position: relative;
  z-index: 1;
}

.header h1 {
  margin: 0;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.header p {
  margin: var(--spacing-md) 0 0 0;
  font-size: var(--font-size-base);
  opacity: 0.9;
  font-weight: 400;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* === Theme Toggle Button === */
.theme-toggle {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 10;
  -webkit-tap-highlight-color: transparent;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.theme-toggle[data-theme="dark"] .sun-icon {
  display: block;
}

.theme-toggle[data-theme="dark"] .moon-icon {
  display: none;
}

.theme-toggle[data-theme="light"] .sun-icon {
  display: none;
}

.theme-toggle[data-theme="light"] .moon-icon {
  display: block;
}

/* === Form Styles === */
form {
  padding: var(--spacing-xl) var(--spacing-lg);
  color: var(--text-primary);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.req {
  color: var(--error-color);
  margin-left: var(--spacing-xs);
  font-weight: 700;
}

/* === Input Styles === */
input[type="text"],
input[type="email"],
input[type="tel"] {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  border: 2px solid var(--border-color-light);
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
  transition: all var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  outline: none;
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="tel"]::placeholder {
  color: var(--text-placeholder);
  opacity: 1;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
  background-color: var(--surface-color);
  transform: translateY(-1px);
}

input[type="text"]:hover:not(:focus),
input[type="email"]:hover:not(:focus),
input[type="tel"]:hover:not(:focus) {
  border-color: var(--border-color);
  transform: translateY(-0.5px);
}

/* Input validation states */
input.invalid {
  border-color: var(--error-color) !important;
  box-shadow: 0 0 0 4px rgba(255, 59, 48, 0.15) !important;
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* === Button Styles === */
input[type="submit"],
.button {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  font-family: var(--font-family);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  width: 100%;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  letter-spacing: -0.01em;
  appearance: none;
  -webkit-appearance: none;
  -webkit-tap-highlight-color: transparent;
}

input[type="submit"]::before,
.button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

input[type="submit"]:hover::before,
.button:hover::before {
  opacity: 1;
}

input[type="submit"]:hover,
.button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

input[type="submit"]:active,
.button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-md);
}

input[type="submit"]:disabled {
  opacity: 0.6;
  transform: none !important;
  cursor: not-allowed;
}

/* === Error & Hint Messages === */
.error {
  display: none;
  color: var(--error-color);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(255, 59, 48, 0.1);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--error-color);
}

.hint {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  margin-top: var(--spacing-xs);
  font-weight: 400;
}

/* === Content Pages === */
.content {
  padding: var(--spacing-xl) var(--spacing-lg);
  color: var(--text-primary);
}

.content h2 {
  color: var(--text-primary);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.note {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--surface-secondary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border-color);
}

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

/* Large screens */
@media (min-width: 1025px) {
  body {
    padding: var(--spacing-xl);
  }
  
  .container {
    margin: var(--spacing-xl) auto;
  }
  
  .header {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
  
  .header h1 {
    font-size: var(--font-size-4xl);
  }
  
  .header p {
    font-size: var(--font-size-lg);
  }
  
  form {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
}

/* Tablet landscape and small desktop */
@media (min-width: 769px) and (max-width: 1024px) {
  body {
    padding: var(--spacing-lg);
  }
  
  .container {
    margin: var(--spacing-lg) auto;
  }
  
  .header {
    padding: calc(var(--spacing-xl) + var(--spacing-sm)) var(--spacing-xl);
  }
  
  form {
    padding: calc(var(--spacing-xl) + var(--spacing-sm)) var(--spacing-xl);
  }
}

/* Tablet portrait */
@media (min-width: 481px) and (max-width: 768px) {
  body {
    padding: var(--spacing-md);
  }
  
  .header h1 {
    font-size: var(--font-size-3xl);
  }
  
  form {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
}

/* Mobile styles */
@media (max-width: 480px) {
  body {
    padding: var(--spacing-sm);
    background-color: var(--surface-color);
  }
  
  .container {
    border-radius: 0;
    box-shadow: none;
    min-height: 100vh;
  }
  
  .header {
    padding: var(--spacing-xl) var(--spacing-md);
    border-radius: 0;
  }
  
  .theme-toggle {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 40px;
    height: 40px;
  }
  
  .theme-toggle svg {
    width: 18px;
    height: 18px;
  }
  
  .header h1 {
    font-size: var(--font-size-2xl);
  }
  
  .header p {
    font-size: var(--font-size-sm);
  }
  
  form {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .form-group {
    margin-bottom: var(--spacing-md);
  }
  
  label {
    font-size: var(--font-size-sm);
  }
  
  input[type="text"],
  input[type="email"],
  input[type="tel"] {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border-radius: var(--radius-md);
  }
  
  input[type="submit"] {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
  }
}

/* Mobile landscape */
@media (max-width: 768px) and (orientation: landscape) {
  .header {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .header h1 {
    font-size: var(--font-size-xl);
  }
  
  .header p {
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
  }
  
  form {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .form-group {
    margin-bottom: var(--spacing-sm);
  }
}

/* === iOS Safe Area Support === */
@supports (padding-top: env(safe-area-inset-top)) {
  @media (max-width: 480px) {
    .container {
      padding-top: env(safe-area-inset-top);
      padding-bottom: env(safe-area-inset-bottom);
    }
  }
}

/* === High DPI / Retina Support === */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  input[type="text"],
  input[type="email"] {
    border-width: 1px;
  }
  
  input[type="text"]:focus,
  input[type="email"]:focus,
  input[type="tel"]:focus {
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
  }
}

/* === Theme-aware input styling === */
input[type="text"],
input[type="email"],
input[type="tel"] {
  background-color: var(--surface-color);
  color: var(--text-primary);
}

[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="email"],
[data-theme="dark"] input[type="tel"] {
  background-color: var(--surface-secondary);
}

[data-theme="dark"] .error {
  background-color: rgba(255, 69, 58, 0.2);
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
input:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* === Print Styles === */
@media print {
  .container {
    box-shadow: none;
    border: 1px solid var(--border-color);
    max-width: none;
  }
  
  .header {
    background: var(--surface-secondary) !important;
    color: var(--text-primary) !important;
  }
  
  input[type="submit"] {
    display: none;
  }
  
  input[type="text"],
  input[type="email"],
  input[type="tel"] {
    border-color: var(--border-color);
    background: transparent;
  }
}