:root {
  --bg-color: #faf6f0;
  --text-color: #2c2c2c;
  --card-bg: #fff5cc;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --accent-color: #d98e04;
  --accent-hover: #f0a500;
  --pin-color: #6a994e;
  --toggle-bg: #ccc;
  --toggle-thumb: #fff;
  --input-bg: #fffefa;
  --note-input-bg: #fff3b0;
  --border-color: #d98e04;
}

body.dark {
  --bg-color: #1e1e1e;
  --text-color: #e6e6e6;
  --card-bg: #2a2a2a;
  --card-shadow: rgba(0, 0, 0, 0.4);
  --accent-color: #f4ac45;
  --accent-hover: #f7bd66;
  --pin-color: #b5e48c;
  --toggle-bg: #555;
  --toggle-thumb: #1a1a1a;
  --input-bg: #292929;
  --note-input-bg: #333333;
  --border-color: #f4ac45;
}

/* Base Styles */
body {
  font-family: "Segoe UI", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 1rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Theme Toggle Switch */
.theme-toggle {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 2rem 0;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--toggle-bg);
  transition: background-color 0.4s ease;
  border-radius: 50px;
}

.slider:before {
  content: "";
  position: absolute;
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background-color: var(--toggle-thumb);
  transition: transform 0.4s ease, background-color 0.4s ease;
  border-radius: 50%;
}

.toggle-switch input:checked + .slider {
  background-color: var(--pin-color);
}

.toggle-switch input:checked + .slider:before {
  transform: translateX(24px);
}

/* Input Area */
.input-area {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin: 20px auto;
  padding: 15px 20px;
  border-radius: 12px;
  max-width: 100rem;
  background-color: var(--input-bg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s ease;
}

.note-input {
  flex: 1;
  min-height: 80px;
  max-height: 150px;
  min-width: 86rem;

  resize: vertical;
  padding: 12px 16px;
  border-radius: 8px;

  font-size: 1rem;
  border: 2px solid var(--border-color);
  background-color: var(--note-input-bg);
  color: var(--text-color);
  outline: none;
  transition: all 0.3s ease;
  line-height: 1.5;
  font-family: "Segoe UI", sans-serif;
}

.note-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 5px var(--accent-color);
}

.add-btn {
  padding: 12px 20px;
  font-size: 1rem;
  background-color: var(--accent-color);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.1s ease;
}

.add-btn:hover {
  background-color: var(--accent-hover);
}

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

/* Filter Bar */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 1.5rem 0;
}

.filter-btn {
  padding: 0.6rem 1.2rem;
  border: 2px solid var(--border-color);
  background-color: transparent;
  color: var(--text-color);
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-btn:hover {
  background-color: var(--note-bg);
}

.filter-btn.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Todo list */
.notes-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 13px; 
  padding: 18px;
  border: 2px solid var(--border-color); 
  border-radius: 12px; 
  margin: 27px;
  background-color: var(--input-bg);
  box-shadow: 0 4px 8px var(--card-shadow); 
}

.note-card {
  position: relative;
  background-color: var(--card-bg);
  padding: 1.5rem;
  width: 271px;
  height: 271px;
  border-radius: 8px;
  box-shadow: 6px 6px 15px rgba(0, 0, 0, 0.15);
  font-size: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease;
  margin: 10px;
}

.note-card:hover {
  transform: translateY(-5px);
}

.note-text {
  color: var(--text-color);
  font-weight: 500;
  margin: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-y: auto;
  max-height: 130px;
  line-height: 1.4;
  font-family: "Segoe UI", sans-serif;
  padding-right: 4px;
}

.note-text::-webkit-scrollbar {
  width: 6px;
}

.note-text::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

.note-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
}

.complete-btn,
.delete-btn {
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.3s ease;
}

.complete-btn {
  background-color: var(--accent-color);
  color: #000;
}

.complete-btn:hover {
  background-color: var(--accent-hover);
}

.delete-btn {
  background-color: #ef4444;
  color: #fff;
}

.delete-btn:hover {
  background-color: #dc2626;
}

/* header */ 
.app-header {
  height: 6rem;
  padding: 1rem 2rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 2rem;
  background: var(--input-bg);
  border-radius: 12px;
  box-shadow: 0 3px 8px var(--card-shadow);
  transition: all 0.3s ease;
}

.header-top {
  display: flex;
  justify-content: flex-end;
}

.app-title {
  text-align: center;
  font-size: 2.5rem;
  margin: -4.5rem 0 0;
  color: var(--accent-color);
  font-weight: bold;
}

/* -------- Responsive Design -------- */

/* Medium Devices - Tablets and smaller laptops */
@media (max-width: 1024px) {
  .note-input {
    min-width: 60rem;
  }

  .notes-container {
    justify-content: center;
  }

  .note-card {
    width: 240px;
    height: 240px;
  }

  .app-title {
    font-size: 2rem;
  }

  .add-btn {
    padding: 10px 18px;
    font-size: 0.95rem;
  }
}

/* Small Devices - Tablets and Large Phones */
@media (max-width: 768px) {
  .note-input {
    min-width: 90%;
  }

  .input-area {
    padding: 12px 16px;
  }

  .note-card {
    width: 100%;
    height: auto;
  }

  .app-title {
    font-size: 1.8rem;
    margin-top: -4rem;
  }

  .filter-bar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .filter-btn {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
  }
}

/* Extra Small Devices - Phones */
@media (max-width: 480px) {
  .note-input {
    min-width: 100%;
    font-size: 0.9rem;
  }

  .note-card {
    padding: 1rem;
    width: 100%;
    height: auto;
  }

  .note-text {
    max-height: 100px;
    font-size: 0.9rem;
  }

  .add-btn,
  .complete-btn,
  .delete-btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }

  .app-title {
    font-size: 1.5rem;
  }

  .input-area,
  .notes-container {
    margin: 10px;
    padding: 10px;
  }
}

@media (max-width: 1470px) {
  .note-input {
    min-width: 80rem;
  }

  .notes-container {
    padding: 14px;
    margin: 20px;
    gap: 10px;
  }

  .note-card {
    width: 260px;
    height: 260px;
  }

  .app-title {
    font-size: 2.2rem;
  }

  .filter-bar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .input-area {
    padding: 12px 18px;
  }

  .add-btn {
    padding: 10px 18px;
    font-size: 0.95rem;
  }

  .note-text {
    max-height: 120px;
  }

  .complete-btn,
  .delete-btn {
    padding: 5px 10px;
    font-size: 0.9rem;
  }
}

@media (max-width: 1387px) {
  .note-input {
    min-width: 70rem;
  }

  .notes-container {
    padding: 12px;
    margin: 18px;
    gap: 8px;
  }

  .note-card {
    width: 240px;
    height: 240px;
  }

  .app-title {
    font-size: 2rem;
  }

  .filter-bar {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .input-area {
    padding: 10px 16px;
  }

  .add-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
  }

  .note-text {
    max-height: 110px;
    font-size: 0.95rem;
  }

  .complete-btn,
  .delete-btn {
    padding: 4px 8px;
    font-size: 0.85rem;
  }
}

/* 1220px and below */
@media (max-width: 1220px) {
  .note-input {
    min-width: 60rem;
  }

  .note-card {
    width: 220px;
    height: 220px;
  }

  .note-text {
    font-size: 0.95rem;
    max-height: 100px;
  }
}

/* 1100px and below */
@media (max-width: 1100px) {
  .note-input {
    min-width: 50rem;
  }

  .note-card {
    width: 200px;
    height: 200px;
  }

  .app-title {
    font-size: 1.8rem;
  }

  .complete-btn,
  .delete-btn {
    font-size: 0.8rem;
  }
}

/* 992px and below */
@media (max-width: 992px) {
  .note-input {
    min-width: 93%;
    margin: 0 auto;
  }

  .notes-container {
    gap: 10px;
    justify-content: center;
  }

  .filter-bar {
    flex-direction: column;
    align-items: center;
  }

  .input-area {
    flex-direction: column;
    gap: 10px;
  }

  .note-card {
    width: 180px;
    height: 180px;
  }
}

/* 768px and below (Tablet) */
@media (max-width: 768px) {
  .app-title {
    font-size: 1.6rem;
    text-align: center;
  }

  .note-card {
    width: 160px;
    height: 160px;
  }

  .note-text {
    font-size: 0.9rem;
  }

  .input-area {
    padding: 12px;
  }
}

/* 600px and below */
@media (max-width: 600px) {
  .note-card {
    width: 100%;
    height: auto;
  }

  .notes-container {
    flex-direction: column;
    padding: 0 12px;
  }

  .input-area {
    flex-direction: column;
    padding: 10px;
    gap: 8px;
  }

  .note-text {
    max-height: none;
  }
}

/* 480px and below (Mobile) */
@media (max-width: 480px) {
  .app-title {
    font-size: 1.4rem;
  }

  .add-btn,
  .complete-btn,
  .delete-btn {
    font-size: 0.75rem;
    padding: 6px 12px;
  }

  .note-card {
    padding: 10px;
  }
}

/* 360px and below */
@media (max-width: 360px) {
  .note-input {
    font-size: 0.50rem;
  }

  .app-title {
    font-size: 1.2rem;
  }

  .note-card {
    font-size: 0.85rem;
    padding: 8px;
  }
}

@media (max-width: 350px) {
  .app-title {
    font-size: 1rem;
    margin-bottom: 10px;
  }

  .note-input {
    font-size: 0.75rem;
    padding: 6px;
  }

  .add-btn,
  .complete-btn,
  .delete-btn {
    font-size: 0.7rem;
    padding: 5px 10px;
  }

  .note-card {
    padding: 6px;
    font-size: 0.8rem;
    width: 100%;
  }

  .theme-toggle {
    transform: scale(0.85);
  }

  .input-area {
    gap: 6px;
    padding: 8px;
  }
}