/* ============================================================
   VARIÁVEIS DE TEMA E ESTILOS GLOBAIS
   ============================================================ */
:root {
  --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition-speed: 0.3s;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --focus-ring: 0 0 0 3px rgba(66, 153, 225, 0.6);
}

/* Tema claro (padrão) */
:root[data-theme="light"] {
  --bg-body: #f0f2f5;
  --bg-card: #ffffff;
  --bg-header: #ffffff;
  --bg-nav: #ffffff;
  --bg-modal: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border-color: #e2e8f0;
  --primary: #3182ce;
  --primary-hover: #2b6cb0;
  --secondary: #718096;
  --secondary-hover: #4a5568;
  --danger: #e53e3e;
  --danger-hover: #c53030;
  --success: #38a169;
  --warning: #d69e2e;
  --focus-ring-color: rgba(49, 130, 206, 0.6);
  --clock-hand-hours: #1a202c;
  --clock-hand-minutes: #4a5568;
  --clock-hand-seconds: #e53e3e;
  --clock-face-bg: #ffffff;
  --clock-marking: #a0aec0;
}

/* Tema escuro */
:root[data-theme="dark"] {
  --bg-body: #1a202c;
  --bg-card: #2d3748;
  --bg-header: #2d3748;
  --bg-nav: #2d3748;
  --bg-modal: #2d3748;
  --text-primary: #f7fafc;
  --text-secondary: #e2e8f0;
  --text-muted: #a0aec0;
  --border-color: #4a5568;
  --primary: #63b3ed;
  --primary-hover: #4299e1;
  --secondary: #a0aec0;
  --secondary-hover: #cbd5e0;
  --danger: #fc8181;
  --danger-hover: #f56565;
  --success: #68d391;
  --warning: #f6ad55;
  --focus-ring-color: rgba(99, 179, 237, 0.6);
  --clock-hand-hours: #f7fafc;
  --clock-hand-minutes: #e2e8f0;
  --clock-hand-seconds: #fc8181;
  --clock-face-bg: #2d3748;
  --clock-marking: #718096;
}

/* ============================================================
   RESET E ESTILOS BASE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

button,
input,
select {
  font-family: inherit;
  font-size: 1rem;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

/* Pular link para acessibilidade */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--border-radius);
  z-index: 1000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 8px;
}

/* ============================================================
   CABEÇALHO
   ============================================================ */
.app-header {
  background-color: var(--bg-header);
  box-shadow: var(--box-shadow);
  padding: 1rem 2rem;
  text-align: center;
  transition: background-color var(--transition-speed);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
}

.app-title {
  font-size: 1.8rem;
  font-weight: 700;
}

.app-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   NAVEGAÇÃO POR ABAS
   ============================================================ */
.tab-nav {
  background-color: var(--bg-nav);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1rem;
  transition: background-color var(--transition-speed);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.5rem 0;
}

.tab-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  color: var(--text-secondary);
  transition: background-color 0.2s, color 0.2s;
  background-color: transparent;
  border: 1px solid transparent;
}

.tab-button:hover {
  background-color: var(--border-color);
}

.tab-button.active {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.tab-button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ============================================================
   CONTEÚDO PRINCIPAL E PAINÉIS
   ============================================================ */
.app-main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.tab-panel {
  animation: fadeIn 0.3s ease;
}

.tab-panel[hidden] {
  display: none !important;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   CARDS E SEÇÕES
   ============================================================ */
.clock-section,
.stopwatch-section,
.timer-section,
.history-section,
.config-section,
.alarm-list {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 1.5rem;
  transition: background-color var(--transition-speed);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* ============================================================
   BOTÕES GERAIS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: background-color 0.2s, transform 0.1s;
  border: 1px solid transparent;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}

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

.btn-secondary {
  background-color: var(--secondary);
  color: #fff;
}

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

.btn-danger {
  background-color: var(--danger);
  color: #fff;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-link {
  background: none;
  border: none;
  color: var(--primary);
  text-decoration: underline;
  padding: 0.2rem 0.5rem;
  font-size: 0.9rem;
}

.btn-link:hover {
  color: var(--primary-hover);
}

/* ============================================================
   RELÓGIO
   ============================================================ */
.clock-mode-buttons {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.btn-mode {
  padding: 0.4rem 1rem;
  border-radius: var(--border-radius);
  background-color: var(--border-color);
  color: var(--text-secondary);
  font-weight: 500;
  transition: background-color 0.2s, color 0.2s;
}

.btn-mode.active {
  background-color: var(--primary);
  color: #fff;
}

.clock-display-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.digital-clock {
  text-align: center;
}

.clock-time {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 2px;
  font-variant-numeric: tabular-nums;
}

.clock-date {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* Relógio analógico */
.analog-clock {
  width: 200px;
  height: 200px;
}

.clock-face {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: var(--clock-face-bg);
  border: 4px solid var(--text-primary);
  box-shadow: 0 0 0 4px var(--border-color), var(--box-shadow);
  transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.clock-marking {
  position: absolute;
  width: 2px;
  height: 8px;
  background-color: var(--clock-marking);
  top: 8px;
  left: 50%;
  transform-origin: 50% 92px;
}

.clock-marking-12 { transform: translateX(-50%) rotate(0deg); }
.clock-marking-1 { transform: translateX(-50%) rotate(30deg); }
.clock-marking-2 { transform: translateX(-50%) rotate(60deg); }
.clock-marking-3 { transform: translateX(-50%) rotate(90deg); }
.clock-marking-4 { transform: translateX(-50%) rotate(120deg); }
.clock-marking-5 { transform: translateX(-50%) rotate(150deg); }
.clock-marking-6 { transform: translateX(-50%) rotate(180deg); }
.clock-marking-7 { transform: translateX(-50%) rotate(210deg); }
.clock-marking-8 { transform: translateX(-50%) rotate(240deg); }
.clock-marking-9 { transform: translateX(-50%) rotate(270deg); }
.clock-marking-10 { transform: translateX(-50%) rotate(300deg); }
.clock-marking-11 { transform: translateX(-50%) rotate(330deg); }

.clock-hand {
  position: absolute;
  bottom: 50%;
  left: 50%;
  transform-origin: 50% 100%;
  border-radius: 4px;
  transition: transform 0.1s linear;
}

.hour-hand {
  width: 4px;
  height: 60px;
  background-color: var(--clock-hand-hours);
  margin-left: -2px;
}

.minute-hand {
  width: 3px;
  height: 80px;
  background-color: var(--clock-hand-minutes);
  margin-left: -1.5px;
}

.second-hand {
  width: 1.5px;
  height: 85px;
  background-color: var(--clock-hand-seconds);
  margin-left: -0.75px;
}

.clock-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  background-color: var(--text-primary);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.hidden {
  display: none !important;
}

/* Contagem regressiva dos alarmes */
.active-alarms-countdown h2 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
}

.alarm-countdowns {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.alarm-countdown-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1rem;
  background-color: var(--border-color);
  border-radius: var(--border-radius);
  flex-wrap: wrap;
}

.alarm-countdown-time {
  font-weight: 600;
  color: var(--primary);
}

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 1rem;
  font-style: italic;
}

/* ============================================================
   LISTA DE ALARMES
   ============================================================ */
.alarm-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.alarm-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
  transition: border-color 0.2s, background-color var(--transition-speed);
}

.alarm-item.active {
  border-left: 5px solid var(--success);
}

.alarm-item.inactive {
  opacity: 0.6;
  border-left: 5px solid var(--text-muted);
}

.alarm-info {
  flex: 1;
  min-width: 200px;
}

.alarm-title {
  font-weight: 600;
  font-size: 1.1rem;
}

.alarm-time {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.alarm-days {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.alarm-actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--secondary);
  border-radius: 26px;
  transition: 0.3s;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: #fff;
  border-radius: 50%;
  transition: 0.3s;
}

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

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

.toggle-switch input:focus-visible + .toggle-slider {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ============================================================
   CRONÔMETRO E TEMPORIZADOR
   ============================================================ */
.stopwatch-display,
.timer-display {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 1rem;
}

.timer-inputs {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.input-group label {
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
  color: var(--text-secondary);
}

.input-group input {
  width: 80px;
  text-align: center;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.2rem;
}

.input-group input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.timer-options {
  text-align: center;
  margin-bottom: 0.5rem;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
}

/* ============================================================
   HISTÓRICO
   ============================================================ */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 400px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  padding: 0.6rem 1rem;
  background-color: var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
}

.history-type {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 12px;
  background-color: var(--secondary);
  color: #fff;
}

.history-type.created { background-color: var(--success); }
.history-type.edited { background-color: var(--warning); }
.history-type.deleted { background-color: var(--danger); }
.history-type.triggered { background-color: var(--primary); }
.history-type.cancelled { background-color: var(--secondary); }

/* ============================================================
   CONFIGURAÇÕES
   ============================================================ */
.config-group {
  margin-bottom: 1.5rem;
}

.config-group label,
.config-group h3 {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.config-group select {
  width: 100%;
  max-width: 300px;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.warning-text {
  font-size: 0.9rem;
  color: var(--warning);
  background-color: rgba(214, 158, 46, 0.1);
  padding: 0.8rem;
  border-radius: var(--border-radius);
}

.notification-status {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-overlay[hidden] {
  display: none !important;
}

.modal {
  background-color: var(--bg-modal);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.5rem;
  transition: background-color var(--transition-speed);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.modal-header h2 {
  margin-bottom: 0;
}

.btn-close {
  font-size: 1.8rem;
  line-height: 1;
  padding: 0.2rem 0.5rem;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  transition: background-color 0.2s;
}

.btn-close:hover {
  background-color: var(--border-color);
}

.alarm-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: 0.3rem;
  font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
  padding: 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
  color: var(--text-primary);
  transition: background-color var(--transition-speed);
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-row .form-group {
  flex: 1;
}

.days-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.day-checkbox {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0.3rem;
  border-radius: var(--border-radius);
  transition: background-color 0.2s;
}

.day-checkbox:hover {
  background-color: var(--border-color);
}

.day-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.days-actions {
  display: flex;
  gap: 1rem;
  margin-top: 0.3rem;
}

.upload-area {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.hidden-file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.sound-file-name {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.modal-buttons {
  justify-content: flex-end;
  margin-top: 0.5rem;
}

/* ============================================================
   OVERLAY DE ALARME DISPARANDO
   ============================================================ */
.ring-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  animation: pulse 1s infinite;
}

.ring-overlay[hidden] {
  display: none !important;
}

.ring-box {
  background-color: var(--bg-modal);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 2rem;
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.ring-alarm-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--danger);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

/* ============================================================
   TOASTS
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 300;
  max-width: 90vw;
}

.toast {
  padding: 0.8rem 1.2rem;
  border-radius: var(--border-radius);
  color: #fff;
  font-weight: 500;
  box-shadow: var(--box-shadow);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.toast.success { background-color: var(--success); }
.toast.error { background-color: var(--danger); }
.toast.info { background-color: var(--primary); }
.toast.warning { background-color: var(--warning); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ============================================================
   UTILITÁRIOS DE ACESSIBILIDADE
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   RESPEITO À REDUÇÃO DE MOVIMENTO
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   RESPONSIVIDADE
   ============================================================ */
@media (max-width: 768px) {
  .app-header {
    padding: 0.8rem 1rem;
  }

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

  .tab-list {
    gap: 0.3rem;
    padding: 0.3rem 0;
  }

  .tab-button {
    padding: 0.5rem 0.7rem;
    font-size: 0.85rem;
  }

  .app-main {
    padding: 1rem 0.8rem;
  }

  .clock-time {
    font-size: 2.2rem;
  }

  .stopwatch-display,
  .timer-display {
    font-size: 2.2rem;
  }

  .analog-clock {
    width: 160px;
    height: 160px;
  }

  .clock-marking {
    height: 6px;
    top: 6px;
    transform-origin: 50% 74px;
  }

  .clock-hand.hour-hand { height: 45px; }
  .clock-hand.minute-hand { height: 60px; }
  .clock-hand.second-hand { height: 65px; }

  .modal {
    padding: 1rem;
  }

  .form-row {
    flex-direction: column;
    gap: 0.8rem;
  }

  .button-group {
    gap: 0.5rem;
  }

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

  .alarm-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .alarm-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

@media (max-width: 480px) {
  .tab-button {
    flex: 1;
    justify-content: center;
    font-size: 0.75rem;
    padding: 0.5rem 0.4rem;
  }

  .tab-button span {
    display: none; /* esconde ícones para economizar espaço */
  }

  .clock-time {
    font-size: 1.8rem;
  }

  .stopwatch-display,
  .timer-display {
    font-size: 1.8rem;
  }

  .analog-clock {
    width: 130px;
    height: 130px;
  }

  .clock-marking {
    height: 5px;
    top: 5px;
    transform-origin: 50% 60px;
  }

  .clock-hand.hour-hand { height: 35px; }
  .clock-hand.minute-hand { height: 48px; }
  .clock-hand.second-hand { height: 52px; }

  .section-header {
    flex-direction: column;
    align-items: stretch;
  }

  .days-grid {
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  }
}