/* ========================================
   RF Communications Website - Theme CSS
   Light/Dark Mode Variables & Colors
   ======================================== */

/* ===== ROOT VARIABLES (LIGHT MODE) ===== */
:root {
  /* Primary & Secondary Colors */
  --primary-color: #90ee90;
  --primary-dark: #6bc66b;
  --primary-light: #b4f5b4;
  --secondary-color: #ff7600;
  --secondary-dark: #cc5e00;
  --secondary-light: #ff9933;

  /* Tertiary Color (NEW) */
  --tertiary-color: #00c5fc;
  --tertiary-dark: #009ac5;
  --tertiary-light: #e0f7ff;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --bg-card: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.7);

  /* Text Colors */
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --text-light: #ffffff;
  --text-heading: #1a1a1a;

  /* Border Colors */
  --border-color: #dee2e6;
  --border-light: #e9ecef;
  --border-dark: #adb5bd;

  /* Shadow */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

  /* Button Colors */
  --btn-primary-bg: var(--primary-color);
  --btn-primary-text: #1a1a1a;
  --btn-primary-hover: var(--primary-dark);
  --btn-secondary-bg: var(--secondary-color);
  --btn-secondary-text: #ffffff;
  --btn-secondary-hover: var(--secondary-dark);
  --btn-tertiary-bg: var(--tertiary-color);
  --btn-tertiary-text: #ffffff;
  --btn-tertiary-hover: var(--tertiary-dark);

  /* Navigation */
  --nav-bg: #90ee90;
  --nav-text: #000000;
  --nav-hover: var(--secondary-color);
  --nav-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);

  /* Footer */
  --footer-bg: #cfcfcf;
  --footer-text: #000000;
  --footer-heading: #f0f0f0;
  --footer-height-desktop: 72px;
  --footer-height-mobile: 120px; /* when stacked links wrap on small devices */

  /* Form Elements */
  --input-bg: #ffffff;
  --input-border: #ced4da;
  --input-text: #333333;
  --input-focus: var(--tertiary-color);
  --input-placeholder: #6c757d;

  /* Success & Error Colors */
  --success-color: #28a745;
  --error-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;

  /* Chatbot */
  --chatbot-bg: #ffffff;
  --chatbot-header: var(--primary-color);
  --chatbot-user-msg: var(--primary-light);
  --chatbot-bot-msg: #f1f3f5;

  /* Transition */
  --transition-speed: 0.3s;
  --transition-ease: ease-in-out;
}

/* ===== DARK MODE VARIABLES ===== */
[data-theme="dark"] {
  /* Background Colors */
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #303030;
  --bg-card: #2a2a2a;
  --bg-overlay: rgba(0, 0, 0, 0.85);

  /* Text Colors */
  --text-primary: #f0f0f0;
  --text-secondary: #b0b0b0;
  --text-tertiary: #808080;
  --text-light: #ffffff;
  --text-heading: #ffffff;

  /* Border Colors */
  --border-color: #404040;
  --border-light: #353535;
  --border-dark: #505050;

  /* Shadow (adjusted for dark mode) */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);

  /* Button Colors */
  --btn-primary-text: #1a1a1a;
  --btn-secondary-text: #ffffff;
  --btn-tertiary-text: #ffffff;

  /* Navigation */
  --nav-bg: var(--primary-dark);
  --nav-text: #f0f0f0;
  --nav-hover: var(--secondary-dark);
  --nav-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);

  /* Footer */
  --footer-bg: #1a1a1a;
  --footer-text: #e9ecef;
  --footer-heading: #ffffff;/* when stacked links wrap on small devices */

  /* Form Elements */
  --input-bg: #2a2a2a;
  --input-border: #404040;
  --input-text: #f0f0f0;
  --input-focus: var(--tertiary-color);
  --input-placeholder: #808080;

  /* Chatbot */
  --chatbot-bg: #2a2a2a;
  --chatbot-header: var(--primary-dark);
  --chatbot-user-msg: #3a4a3a;
  --chatbot-bot-msg: #353535;
}

/* ===== SMOOTH THEME TRANSITION ===== */
* {
  transition: background-color var(--transition-speed) var(--transition-ease),
              color var(--transition-speed) var(--transition-ease),
              border-color var(--transition-speed) var(--transition-ease);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  overflow-y: auto;
}

/* Prevent transition on page load */
body.no-transition * {
  transition: none !important;
}

/* ===== BODY BASE STYLES ===== */
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  overflow-y: auto;
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}

body::-webkit-scrollbar {
  display: none;  /* Chrome, Safari and Opera */
}

/* ===== GRADIENT BACKGROUNDS ===== */
.gradient-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.gradient-secondary {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
}

.gradient-tricolor {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--tertiary-color) 50%, var(--secondary-color) 100%);
}

.gradient-mixed {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

/* ===== THEME TOGGLE BUTTON STYLES ===== */
.theme-toggle {
  position: relative;
  width: 60px;
  height: 30px;
  background-color: var(--border-color);
  border-radius: 30px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  border: 2px solid var(--border-light);
}

.theme-toggle:hover {
  background-color: var(--primary-light);
}

.theme-toggle-slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background-color: var(--bg-primary);
  border-radius: 50%;
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

[data-theme="dark"] .theme-toggle-slider {
  transform: translateX(30px);
}

/* ===== UTILITY CLASSES FOR COLORS ===== */
.text-primary-color { color: var(--primary-color) !important; }
.text-secondary-color { color: var(--secondary-color) !important; }
.text-tertiary-color { color: var(--tertiary-color) !important; }

.bg-primary-color { background-color: var(--primary-color) !important; }
.bg-secondary-color { background-color: var(--secondary-color) !important; }
.bg-tertiary-color { background-color: var(--tertiary-color) !important; }

.border-primary-color { border-color: var(--primary-color) !important; }
.border-secondary-color { border-color: var(--secondary-color) !important; }
.border-tertiary-color { border-color: var(--tertiary-color) !important; }

/* ===== CARD STYLES ===== */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

/* ===== SELECTION COLOR ===== */
::selection {
  background-color: var(--tertiary-color);
  color: #ffffff;
}

::-moz-selection {
  background-color: var(--primary-color);
  color: var(--text-heading);
}

/* ===== SCROLLBAR STYLES ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 5px;
}

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

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-color) var(--bg-secondary);
}