/* Cascading Style Sheet */
/* ------------------------------------------------- */

/* Root Variables */
:root {
  --primary-color: #ff6b8b;
  --secondary-color: #ffa7ba;
  --accent-color: #ff4757;
  --background-light: #fff5f7;
  --background-dark: #1f2937;
  --text-light: #333;
  --text-dark: #f3f4f6;
  --shadow-soft: 0 4px 6px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
  --transition-slow: all 1s ease-in-out;
}

/* Theme Overrides */
[data-theme="valentine"] {
  --primary: var(--primary-color);
  --secondary: var(--secondary-color);
  --accent: var(--accent-color);
  --base-100: var(--background-light);
  --base-content: var(--text-light);
}
[data-theme="valentine"] body {
  background: linear-gradient(to bottom right, #fdf2f8, #fce7f3);
}

[data-theme="light"] {
  --primary: #f472b6;
  --secondary: #fda4af;
  --accent: #fb7185;
  --base-100: #ffffff;
  --base-content: var(--text-light);
}
[data-theme="light"] body {
  background: linear-gradient(to bottom right, #f9fafb, #f3f4f6);
}

[data-theme="dark"] {
  --primary: #ec4899;
  --secondary: #f43f5e;
  --accent: #e11d48;
  --base-100: var(--background-dark);
  --base-content: var(--text-dark);
}
[data-theme="dark"] body {
  background: linear-gradient(to bottom right, #111827, #1f2937);
}

/* Global Resets */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

/* Body */
body {
  font-family: "Quicksand", sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
  position: relative;
  color: var(--base-content);
  transition: background 0.7s ease;
}

/* Animation */
@keyframes fadeInOut {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}
.instruction {
  animation: fadeInOut 3s ease-in-out infinite;
}

/* Heart Styles */
.heart-svg {
  animation: heartbeat 2.5s ease-in-out infinite;
}
@keyframes heartbeat {
  0%,
  100% {
    transform: scale(1);
    fill: var(--primary);
  }
  25% {
    transform: scale(1.15);
    fill: var(--accent);
  }
  30% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.95);
  }
  60% {
    transform: scale(1);
  }
  75% {
    transform: scale(1.1);
    fill: var(--secondary);
  }
}

/* Message Card */
.message-card {
  transition: var(--transition-slow);
}
.message-card.open {
  max-height: 80vh !important;
  opacity: 1 !important;
  transform: translate(-50%, -50%) scale(1) !important;
  padding: clamp(1rem, 5vw, 2.5rem) !important;
}

/* Heart Movement */
.heart-toggle.moved {
  top: auto !important;
  bottom: 3.5rem !important;
  transform: translate(-50%, 0) !important;
}

/* Bg Transition */
.interactive-container.active {
  background-color: var(--secondary) !important;
  transition: var(--transition-slow);
  margin-bottom: 100px;
}

/* Confetti */
.confetti {
  position: fixed;
  width: 8px;
  height: 8px;
  pointer-events: none;
  z-index: 1000;
  border-radius: 50%;
  animation: confettiFall 3s linear forwards;
}

/* Background Particles */
.background-particles .particle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: transparent;
  animation: particleFloat 20s linear infinite;
  opacity: 0.3;
  filter: blur(1px);
}
.background-particles .particle::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("data:image/svg+xml;base64,PHN2ZyB2aWV3Qm94PSIwIDAgMzIgMjkuNiIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cGF0aCBkPSJNMjMuNiwwYy0zLjQsMC02LjMsMi43LTcuNiw1LjZDMTQuNywyLjcsMTEuOCwwLDguNCwwQzMuOCwwLDAsMy44LDAsOC40YzAsOS40LDkuNSwxMS45LDE2LDIxLjJjNi4xLTkuMywxNi0xMi4xLDE2LTIxLjJDMzIsMy44LDI4LjIsMCwyMy42LDB6IiBmaWxsPSIjZmY2YjhiIi8+PC9zdmc+")
    no-repeat center/cover;
}
@keyframes particleFloat {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.5;
  }
  100% {
    transform: translateY(100vh) rotate(360deg);
    opacity: 0;
  }
}

/* Scrollbar */
.message-card::-webkit-scrollbar {
  width: 6px;
}
.message-card::-webkit-scrollbar-track {
  background: transparent;
}
.message-card::-webkit-scrollbar-thumb {
  background-color: var(--primary);
  border-radius: 3px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .heart-svg,
  .background-particles .particle {
    animation: none !important;
  }
}

/* Responsive @media Queries */
@media (max-width: 480px) {
  .heart {
    width: 50px !important;
    height: 50px !important;
  }
  .message-card {
    width: 95% !important;
  }
  .message-title {
    font-size: 1.8rem !important;
  }
  .message-content {
    font-size: 0.9rem !important;
    text-align: left !important;
  }
  .instruction {
    font-size: 1rem !important;
  }
  .valentine-container {
    padding-bottom: 6rem !important;
  }
}

@media (min-width: 481px) and (max-width: 640px) {
  .heart {
    width: 60px !important;
    height: 60px !important;
  }
  .message-card {
    width: 90% !important;
  }
  .instruction {
    font-size: 1.2rem !important;
  }
  .valentine-container {
    padding-bottom: 7rem !important;
  }
}

@media (min-width: 641px) and (max-width: 768px) {
  .heart {
    width: 70px !important;
    height: 70px !important;
  }
  .message-card {
    width: 85% !important;
  }
  .instruction {
    font-size: 1.4rem !important;
  }
  .valentine-container {
    padding-bottom: 8rem !important;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .heart {
    width: 80px !important;
    height: 80px !important;
  }
  .message-card {
    width: 75% !important;
  }
  .instruction {
    font-size: 1.6rem !important;
  }
  .valentine-container {
    padding-bottom: 9rem !important;
  }
}

@media (min-width: 1025px) and (max-width: 1280px) {
  .heart {
    width: 90px !important;
    height: 90px !important;
  }
  .message-card {
    width: 60% !important;
  }
  .valentine-container {
    padding-bottom: 10rem !important;
  }
}

@media (min-width: 1281px) and (max-width: 1536px) {
  .heart {
    width: 100px !important;
    height: 100px !important;
  }
  .message-card {
    width: 50% !important;
  }
  .instruction {
    font-size: 2rem !important;
  }
  .valentine-container {
    padding-bottom: 12rem !important;
  }
}

@media (min-width: 1537px) {
  .heart {
    width: 120px !important;
    height: 120px !important;
  }
  .message-card {
    width: 40% !important;
  }
  .instruction {
    font-size: 2.5rem !important;
  }
  .valentine-container {
    padding-bottom: 14rem !important;
  }
}

/* Keyframes */
@keyframes confettiFall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

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

@keyframes slideIn {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* Utilities */
.animate-fadeIn {
  animation: fadeIn 1s ease-in-out;
}
.animate-slideIn {
  animation: slideIn 1s ease-in-out;
}
.font-dancing {
  font-family: "Dancing Script", cursive;
}

/* Hover and Focus */
.heart-toggle:hover .heart-svg {
  fill: var(--accent);
  transform: scale(1.15);
}
.toggle-input:focus + .heart {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .instruction,
  .theme-switcher,
  .btn,
  .background-particles {
    display: none;
  }
  .message-card {
    max-height: none !important;
    opacity: 1 !important;
    position: static !important;
    transform: none !important;
    width: 100% !important;
    border: none;
  }
  body {
    background: white !important;
    color: black !important;
  }
}

/* Orientation */
@media (orientation: landscape) and (max-height: 500px) {
  .message-card {
    max-height: 95vh !important;
  }
}

/* Contrast and Color Scheme */
@media (prefers-contrast: more) {
  body {
    background: white !important;
    color: black !important;
  }
  .heart-svg {
    fill: black !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --base-100: var(--background-dark);
    --base-content: var(--text-dark);
  }
}

/* Touch Devices */
@media (hover: none) {
  .heart-toggle {
    transform: scale(1.3);
  }
  .btn {
    min-width: 3rem;
    min-height: 3rem;
  }
}

/* ------------------------------------end------------------------------------ */