/* ============================================
   Foco - Pomodoro Timer Styles
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================ */

:root {
  /* Colors - Focus Mode */
  --color-focus: rgb(186, 73, 73);
  --color-focus-dark: rgb(160, 60, 60);
  
  /* Colors - Short Break Mode */
  --color-shortbreak: rgb(56, 133, 138);
  --color-shortbreak-dark: rgb(50, 125, 130);
  
  /* Colors - Long Break Mode */
  --color-longbreak: rgb(57, 112, 151);
  --color-longbreak-dark: rgb(50, 105, 145);
  
  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.65rem;
  --font-size-sm: 0.85rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2rem;
  --font-size-timer: 7rem;
  
  /* Spacing */
  --spacing-xs: 0.375rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  
  /* Progress */
  --progress-height: 0%;
  
  /* Current theme color (will be overridden by JS) */
  --current-color: var(--color-focus);
  --current-color-dark: var(--color-focus-dark);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  color: white;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  transition: background-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* Progress bar background */
body::before {
  content: '';
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--progress-height);
  background-color: rgba(255, 255, 255, 0.15);
  transition: height var(--transition-slow);
  z-index: 1;
  pointer-events: none;
}

/* ============================================
   THEME MODES
   ============================================ */

.focus {
  background-color: var(--color-focus);
  --current-color: var(--color-focus);
  --current-color-dark: var(--color-focus-dark);
}

.shortbreak {
  background-color: var(--color-shortbreak);
  --current-color: var(--color-shortbreak);
  --current-color-dark: var(--color-shortbreak-dark);
}

.longbreak {
  background-color: var(--color-longbreak);
  --current-color: var(--color-longbreak);
  --current-color-dark: var(--color-longbreak-dark);
}

/* ============================================
   LAYOUT - CONTAINER
   ============================================ */

.container {
  padding: 0 var(--spacing-md);
  max-width: 30rem;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
  gap: var(--spacing-lg);
}

/* ============================================
   HEADER
   ============================================ */

.header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.step-label {
  font-size: var(--font-size-lg);
  font-weight: 600;
  opacity: 0.9;
  transition: opacity var(--transition-base);
  margin: 0;
}

.settings-btn {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
  transform-origin: center;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

.settings-btn:hover {
  transform: rotate(90deg);
}

.settings-btn:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}

/* ============================================
   MAIN TIMER SECTION
   ============================================ */

main {
  background-color: transparent;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.timer {
  font-size: var(--font-size-timer);
  font-weight: bold;
  line-height: 1;
  letter-spacing: -0.02em;
}

.step-text {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  margin: 0;
}

/* ============================================
   CONTROLS
   ============================================ */

.controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  transition: all var(--transition-base);
}

.btn:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}

/* Primary button (Start/Pause) */
.btn--primary {
  background-color: white;
  color: var(--current-color);
  padding: 0 var(--spacing-lg);
  font-size: 1.6rem;
  height: 4rem;
  min-width: 14rem;
}

.btn--primary i {
  font-size: 1.4rem;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--primary:active {
  transform: translateY(2px);
}

/* Button text */
.btn__text {
  display: inline;
}

/* Skip button */
.btn--skip {
  background-color: transparent;
  color: white;
  border: 3px solid white;
  height: 4rem;
  padding: 0 1.1rem;
  display: none;
}

.btn--skip i {
  font-size: 1.75rem;
}

.btn--skip.show {
  display: flex;
  animation: skipBtnAppear 0.5s ease-out;
}

.btn--skip:hover {
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.btn--skip:active {
  transform: translateY(2px);
}

@keyframes skipBtnAppear {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   MODAL
   ============================================ */

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn var(--transition-base);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal__content {
  background-color: var(--current-color);
  border-radius: var(--radius-sm);
  width: 90%;
  max-width: 32rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn var(--transition-base);
  border: none;
  overflow: hidden;
}

/* Theme-specific modal backgrounds */
.focus .modal__content {
  background-color: var(--color-focus);
}

.shortbreak .modal__content {
  background-color: var(--color-shortbreak);
}

.longbreak .modal__content {
  background-color: var(--color-longbreak);
}

@keyframes slideIn {
  from { 
    transform: translateY(-3rem); 
    opacity: 0; 
  }
  to { 
    transform: translateY(0); 
    opacity: 1; 
  }
}

/* Modal Header */
.modal__header {
  background: transparent;
  color: white;
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: none;
}

.modal__title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.modal__title i {
  font-size: 1.3rem;
  opacity: 0.9;
}

.modal__close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  width: 2.2rem;
  height: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

.modal__close:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.2);
}

.modal__close:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}

/* Modal Body */
.modal__body {
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
  color: white;
}

/* Settings */
.setting {
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
}

.setting:last-child {
  margin-bottom: 0;
}

.setting__label {
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.9);
}

/* Time Input Component */
.time-input {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.time-input__btn {
  width: 3rem;
  height: 3rem;
  border: none;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.15);
  color: white;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.time-input__btn:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

.time-input__btn:active {
  transform: scale(0.95);
}

.time-input__display {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  height: 3rem;
}

.time-input__value {
  width: 3rem;
  border: none;
  background: transparent;
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  -moz-appearance: textfield;
}

.time-input__value::-webkit-outer-spin-button,
.time-input__value::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.time-input__value:focus {
  outline: none;
}

.time-input__unit {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}

/* Checkbox Setting */
.setting--checkbox {
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

/* Hide default checkbox */
.setting__checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

/* Custom toggle switch */
.setting__label--checkbox {
  margin: 0;
  font-weight: 500;
  font-size: var(--font-size-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
}

.toggle-switch {
  position: relative;
  width: 3.2rem;
  height: 1.8rem;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 1rem;
  transition: all var(--transition-base);
  flex-shrink: 0;
  order: 1;
  margin-left: auto;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 0.25rem;
  left: 0.25rem;
  width: 1.3rem;
  height: 1.3rem;
  background-color: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.setting__checkbox:checked + .setting__label--checkbox .toggle-switch {
  background-color: white;
}

.setting__checkbox:checked + .setting__label--checkbox .toggle-switch::after {
  transform: translateX(1.4rem);
  background-color: var(--current-color);
}

.setting__checkbox:focus-visible + .setting__label--checkbox .toggle-switch {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}

/* Modal Footer */
.modal__footer {
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
  border-top: none;
  display: flex;
  justify-content: stretch;
  gap: var(--spacing-sm);
}

/* Modal Buttons */
.btn--secondary {
  flex: 1;
  background-color: rgba(255, 255, 255, 0.15);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
}

.btn--secondary:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

.btn--save {
  flex: 1;
  background-color: white;
  color: var(--current-color);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
}

/* Theme-specific save button colors */
.focus .btn--save {
  color: var(--color-focus);
}

.shortbreak .btn--save {
  color: var(--color-shortbreak);
}

.longbreak .btn--save {
  color: var(--color-longbreak);
}

.btn--save:hover {
  background-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

.btn--secondary i,
.btn--save i {
  font-size: 0.85rem;
}

/* ============================================
   RESPONSIVE - MOBILE (max-width: 480px)
   ============================================ */

@media (max-width: 480px) {
  :root {
    --font-size-timer: 3.75rem;
    --font-size-lg: 1rem;
  }
  
  .header {
    font-size: 1.3rem;
  }
  
  .settings-btn {
    font-size: 1rem;
  }
  
  .btn--primary {
    font-size: 0.85rem;
    height: 2.5rem;
    min-width: 7rem;
    padding: 0 var(--spacing-sm);
  }
  
  .btn--primary i {
    font-size: 0.75rem;
  }
  
  .btn--skip {
    font-size: 0.85rem;
    height: 2.5rem;
    padding: 0 var(--spacing-sm);
  }
  
  .btn--skip i {
    font-size: 0.85rem;
  }
  
  .container {
    gap: var(--spacing-md);
  }
  
  main {
    gap: var(--spacing-md);
  }
  
  .controls {
    gap: var(--spacing-xs);
  }
}

/* ============================================
   RESPONSIVE - TABLET (481px - 768px)
   ============================================ */

@media (min-width: 481px) and (max-width: 768px) {
  :root {
    --font-size-timer: 5.5rem;
    --font-size-lg: 1.3rem;
  }
  
  .header {
    font-size: 1.6rem;
  }
  
  .settings-btn {
    font-size: 1.2rem;
  }
  
  .btn--primary {
    font-size: 1rem;
    height: 2.8rem;
    min-width: 9rem;
    padding: 0 var(--spacing-md);
  }
  
  .btn--primary i {
    font-size: 0.9rem;
  }
  
  .btn--skip {
    font-size: 1rem;
    height: 2.8rem;
    padding: 0 var(--spacing-md);
  }
  
  .btn--skip i {
    font-size: 1.1rem;
  }
  
  .container {
    gap: var(--spacing-md);
  }
  
  main {
    gap: var(--spacing-md);
  }
}

/* ============================================
   RESPONSIVE - DESKTOP LARGE (1200px+)
   ============================================ */

@media (min-width: 1200px) {
  :root {
    --font-size-timer: 10rem;
    --font-size-lg: 2rem;
  }
  
  .header {
    font-size: 2.6rem;
  }
  
  .settings-btn {
    font-size: 1.6rem;
  }
  
  .btn--primary {
    font-size: 1.9rem;
    height: 4.7rem;
    min-width: 17rem;
    padding: 0 var(--spacing-xl);
  }
  
  .btn--primary i {
    font-size: 1.7rem;
  }
  
  .btn--skip {
    font-size: 1.9rem;
    height: 4.7rem;
    padding: 0 1.3rem;
  }
  
  .btn--skip i {
    font-size: 2rem;
  }
}

/* ============================================
   ACCESSIBILITY - Reduced Motion
   ============================================ */

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

/* ============================================
   ACCESSIBILITY - Focus Styles
   ============================================ */

:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 2px;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  body {
    background-color: white !important;
    color: black !important;
  }
  
  .modal,
  .settings-btn,
  .btn--skip {
    display: none !important;
  }
}