/* Base & Reset */
:root {
  /* Simple Theme (Default) - Clean, Minimal, Modern */
  --bg-color: #f8f9fa;
  --text-color: #333;
  --primary-color: #6c5ce7;
  --secondary-color: #a29bfe;
  --danger-color: #ff7675;
  --accent-color: #00cec9;
  --card-bg: #ffffff;
  --header-bg: #ffffff;
  --font-main: 'Inter', sans-serif;
  --border-radius: 16px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --gauge-bg: #eef2f5;
  --gauge-size: 200px;
  --btn-radius: 50px;

  /* Layout */
  --header-height: 60px;
  --max-width: 400px;
}

/* Dark Mode Override for Simple Theme */
body.dark-mode {
  --bg-color: #1a1d23;
  --text-color: #e8eaed;
  --primary-color: #a29bfe;
  --secondary-color: #6c5ce7;
  --danger-color: #ff6b6b;
  --accent-color: #81ecec;
  --card-bg: #242830;
  --header-bg: #242830;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --gauge-bg: #3a3f4a;
}

/* ============================================
   SPORTY THEME - Gym/Workout App Style
   ============================================ */
body.theme-sporty {
  --bg-color: #0a0a0a;
  --text-color: #fff;
  --primary-color: #ff3c3c;
  --secondary-color: #ff6b35;
  --danger-color: #ff3c3c;
  --accent-color: #00ff88;
  --card-bg: #141414;
  --header-bg: #0a0a0a;
  --font-main: 'Inter', sans-serif;
  --border-radius: 8px;
  --shadow: 0 0 30px rgba(255, 60, 60, 0.15);
  --gauge-bg: #2a2a2a;
  --gauge-size: 240px;
  --btn-radius: 8px;
}

body.theme-sporty.light-mode {
  --bg-color: #f0f0f0;
  --text-color: #0a0a0a;
  --card-bg: #ffffff;
  --header-bg: #ffffff;
  --gauge-bg: #e0e0e0;
  --shadow: 0 0 30px rgba(255, 60, 60, 0.1);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* App Container */
.app-container {
  width: 100%;
  max-width: var(--max-width);
  height: 100vh;
  max-height: 600px;
  background-color: var(--card-bg);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-y: auto;
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
}

/* ============================================
   HEADER - Simple Theme
   ============================================ */
.app-header {
  height: var(--header-height);
  background-color: var(--header-bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid rgba(128, 128, 128, 0.1);
}

.logo {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-color);
  letter-spacing: 0.5px;
  opacity: 0.7;
}

/* ============================================
   HEADER - Sporty Theme
   ============================================ */
body.theme-sporty .app-header {
  background: linear-gradient(135deg, rgba(255, 60, 60, 0.1), transparent);
  border-bottom: 2px solid var(--primary-color);
  position: relative;
}

body.theme-sporty .app-header::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  box-shadow: 0 0 10px var(--primary-color);
}

body.theme-sporty .logo {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 3px;
  text-shadow: 0 0 20px rgba(255, 60, 60, 0.5);
}

.header-controls {
  display: flex;
  gap: 10px;
}

.btn-icon {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: transform 0.2s, background-color 0.2s;
}

.btn-icon:hover {
  transform: scale(1.1);
  background-color: rgba(128, 128, 128, 0.1);
}

body.theme-sporty .btn-icon {
  background: rgba(255, 60, 60, 0.1);
  border: 1px solid rgba(255, 60, 60, 0.3);
}

body.theme-sporty .btn-icon:hover {
  background: rgba(255, 60, 60, 0.2);
  box-shadow: 0 0 15px rgba(255, 60, 60, 0.3);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  gap: 20px;
}

/* Timer Display Section */
.timer-display {
  flex: 2;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.screen {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   STATUS MESSAGE - Simple Theme
   ============================================ */
.status-message #setCount {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-color);
  opacity: 0.8;
}

/* ============================================
   STATUS MESSAGE - Sporty Theme
   ============================================ */
body.theme-sporty .status-message #setCount {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 0 30px rgba(255, 60, 60, 0.5);
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    text-shadow: 0 0 20px rgba(255, 60, 60, 0.5);
  }
  50% {
    text-shadow: 0 0 40px rgba(255, 60, 60, 0.8), 0 0 60px rgba(255, 60, 60, 0.4);
  }
}

/* ============================================
   SET INFO - Simple Theme
   ============================================ */
.set-info {
  font-size: 1rem;
  font-weight: 500;
  color: var(--secondary-color);
  margin-bottom: 10px;
}

/* ============================================
   SET INFO - Sporty Theme
   ============================================ */
body.theme-sporty .set-info {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 4px;
  padding: 10px 24px;
  background: rgba(0, 255, 136, 0.1);
  border: 2px solid var(--accent-color);
  border-radius: 4px;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
  animation: border-pulse 1.5s ease-in-out infinite;
}

@keyframes border-pulse {
  0%, 100% {
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.2);
  }
  50% {
    box-shadow: 0 0 25px rgba(0, 255, 136, 0.4);
  }
}

/* ============================================
   GAUGE - Simple Theme
   ============================================ */
.gauge-container {
  position: relative;
  width: var(--gauge-size);
  height: var(--gauge-size);
}

#time-gauge {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.time-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

#remaining-time {
  font-size: 2.5rem;
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  color: var(--text-color);
}

/* ============================================
   GAUGE - Sporty Theme
   ============================================ */
body.theme-sporty .gauge-container {
  position: relative;
}

body.theme-sporty .gauge-container::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 60, 60, 0.1) 0%, transparent 70%);
  animation: gauge-pulse 2s ease-in-out infinite;
}

@keyframes gauge-pulse {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 1;
  }
}

body.theme-sporty #remaining-time {
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 30px rgba(255, 60, 60, 0.8);
  letter-spacing: 2px;
}

/* ============================================
   ALARM SCREEN - Simple Theme
   ============================================ */
.alarm-text {
  font-family: 'Yuji Mai', serif;
  font-size: 2rem;
  color: var(--danger-color);
  margin-bottom: 20px;
  animation: gentle-shake 0.5s infinite;
}

@keyframes gentle-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-2px); }
  75% { transform: translateX(2px); }
}

/* ============================================
   ALARM SCREEN - Sporty Theme
   ============================================ */
body.theme-sporty .alarm-text {
  font-family: var(--font-main);
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 6px;
  text-shadow: 
    0 0 20px var(--primary-color),
    0 0 40px var(--primary-color),
    0 0 60px var(--primary-color);
  animation: intense-shake 0.1s infinite, flash-glow 0.5s ease-in-out infinite alternate;
}

@keyframes intense-shake {
  0% { transform: translate(2px, 1px) rotate(0deg); }
  20% { transform: translate(-2px, -1px) rotate(-2deg); }
  40% { transform: translate(2px, -1px) rotate(2deg); }
  60% { transform: translate(-2px, 1px) rotate(0deg); }
  80% { transform: translate(2px, 1px) rotate(2deg); }
  100% { transform: translate(-2px, -1px) rotate(-2deg); }
}

@keyframes flash-glow {
  from {
    text-shadow: 
      0 0 20px var(--primary-color),
      0 0 40px var(--primary-color);
  }
  to {
    text-shadow: 
      0 0 40px var(--primary-color),
      0 0 80px var(--primary-color),
      0 0 120px var(--primary-color);
  }
}

body.theme-sporty #alarm-screen {
  background: radial-gradient(circle at center, rgba(255, 60, 60, 0.2), transparent 70%);
  position: relative;
}

body.theme-sporty #alarm-screen::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 48%, rgba(255, 60, 60, 0.1) 50%, transparent 52%);
  background-size: 20px 20px;
  animation: scan-lines 0.5s linear infinite;
  pointer-events: none;
}

@keyframes scan-lines {
  0% { transform: translateY(0); }
  100% { transform: translateY(20px); }
}

/* ============================================
   SETTINGS SECTION - Simple Theme
   ============================================ */
.settings-section {
  flex: 1;
  display: flex;
  gap: 15px;
  padding-top: 20px;
  border-top: 1px solid rgba(128, 128, 128, 0.1);
}

.setting-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-item label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-color);
  opacity: 0.5;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.input-wrapper {
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  padding: 12px;
  display: flex;
  align-items: center;
  border: 1px solid rgba(128, 128, 128, 0.1);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

input[type="number"] {
  width: 100%;
  border: none;
  background: transparent;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-color);
  text-align: center;
  outline: none;
}

/* ============================================
   SETTINGS SECTION - Sporty Theme
   ============================================ */
body.theme-sporty .settings-section {
  border-top: 2px solid rgba(255, 60, 60, 0.3);
  background: linear-gradient(180deg, rgba(255, 60, 60, 0.05), transparent);
  padding: 20px;
  margin: 0 -20px;
  width: calc(100% + 40px);
}

body.theme-sporty .setting-item label {
  font-weight: 700;
  color: var(--primary-color);
  opacity: 1;
  letter-spacing: 2px;
}

body.theme-sporty .input-wrapper {
  background: rgba(255, 60, 60, 0.05);
  border: 2px solid rgba(255, 60, 60, 0.3);
  border-radius: 4px;
}

body.theme-sporty .input-wrapper:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 15px rgba(255, 60, 60, 0.3);
}

body.theme-sporty input[type="number"] {
  font-weight: 700;
  font-size: 1.4rem;
}

/* ============================================
   BUTTONS - Simple Theme
   ============================================ */
.btn-primary,
.btn-danger {
  padding: 14px 40px;
  border: none;
  border-radius: var(--btn-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s, opacity 0.2s;
  letter-spacing: 1px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.4);
}

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

.btn-danger {
  background-color: var(--danger-color);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

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

/* ============================================
   BUTTONS - Sporty Theme
   ============================================ */
body.theme-sporty .btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  font-weight: 900;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  padding: 18px 50px;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  box-shadow: 
    0 0 30px rgba(255, 60, 60, 0.5),
    inset 0 0 20px rgba(255, 255, 255, 0.1);
}

body.theme-sporty .btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

body.theme-sporty .btn-primary:hover {
  box-shadow: 
    0 0 40px rgba(255, 60, 60, 0.7),
    0 0 60px rgba(255, 60, 60, 0.4);
  transform: scale(1.02);
}

body.theme-sporty .btn-primary:active {
  transform: scale(0.98);
  box-shadow: 0 0 20px rgba(255, 60, 60, 0.8);
}

body.theme-sporty .btn-danger {
  background: transparent;
  border: 3px solid var(--primary-color);
  color: var(--primary-color);
  font-weight: 900;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  padding: 18px 50px;
  box-shadow: 
    0 0 20px rgba(255, 60, 60, 0.3),
    inset 0 0 30px rgba(255, 60, 60, 0.1);
  animation: danger-pulse 0.5s ease-in-out infinite alternate;
}

@keyframes danger-pulse {
  from {
    box-shadow: 
      0 0 20px rgba(255, 60, 60, 0.3),
      inset 0 0 30px rgba(255, 60, 60, 0.1);
  }
  to {
    box-shadow: 
      0 0 40px rgba(255, 60, 60, 0.6),
      inset 0 0 40px rgba(255, 60, 60, 0.2);
  }
}

body.theme-sporty .btn-danger:hover {
  background: var(--primary-color);
  color: white;
}

/* ============================================
   SPORTY THEME - Extra Effects
   ============================================ */
body.theme-sporty .app-container {
  position: relative;
}

body.theme-sporty .app-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  z-index: 10;
}

body.theme-sporty .main-content {
  position: relative;
}

/* Corner accents for sporty theme */
body.theme-sporty .timer-display::before,
body.theme-sporty .timer-display::after {
  content: '';
  position: absolute;
  width: 30px;
  height: 30px;
  border: 3px solid var(--primary-color);
}

body.theme-sporty .timer-display::before {
  top: 0;
  left: 20px;
  border-right: none;
  border-bottom: none;
}

body.theme-sporty .timer-display::after {
  top: 0;
  right: 20px;
  border-left: none;
  border-bottom: none;
}

body.theme-sporty .timer-display {
  position: relative;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 350px) {
  :root {
    --gauge-size: 160px;
  }

  body.theme-sporty {
    --gauge-size: 180px;
  }

  #remaining-time {
    font-size: 2rem;
  }

  body.theme-sporty #remaining-time {
    font-size: 2.5rem;
  }

  .alarm-text {
    font-size: 1.5rem;
  }

  body.theme-sporty .alarm-text {
    font-size: 2rem;
  }

  body.theme-sporty .btn-primary,
  body.theme-sporty .btn-danger {
    padding: 14px 30px;
    font-size: 1rem;
    letter-spacing: 2px;
  }
}