/* GDG Color Palette & Variables */
:root {
  --google-blue: #4285f4;
  --google-red: #ea4335;
  --google-yellow: #fbbc04;
  --google-green: #34a853;
  --google-grey: #5f6368;

  /* Theme Colors - Dynamic */
  --theme-primary: var(--google-blue); /* Changes based on JS state */
  --theme-bg: #202124;

  --text-high: #e8eaed;
  --text-med: #bdc1c6;

  --font-display: "Google Sans", "Roboto", sans-serif;
  --font-mono: "Roboto Mono", monospace;
}

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

body {
  font-family: var(--font-display);
  background-color: var(--theme-bg);
  color: var(--text-high);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.5s ease;
}

/* === GDG Background Decoration === */
.gdg-decor-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0.03;
  font-weight: 700;
  font-size: 40vw;
  color: var(--text-high);
}

.gdg-decor-bg .bracket {
  transform: scaleY(1.2);
}

/* === Header === */
.page-header {
  padding: 1.5rem;
  text-align: center;
}

.gdg-logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.blue {
  color: var(--google-blue);
}
.red {
  color: var(--google-red);
}
.yellow {
  color: var(--google-yellow);
}
.green {
  color: var(--google-green);
}

/* === Layout & Panel === */
.layout {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1rem 3rem 1rem;
}

.glass-effect {
  background: rgba(48, 49, 52, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.panel {
  width: 100%;
  max-width: 420px;
  border-radius: 28px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  position: relative;
  overflow: hidden;
}

/* Theme Bar at top */
.panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--theme-primary);
  transition: background 0.4s ease;
}

/* === Mode Chips === */
.mode-switch {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  padding: 4px;
  border-radius: 100px;
}

.mode-chip {
  background: transparent;
  border: none;
  color: var(--text-med);
  padding: 8px 16px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.mode-chip:hover {
  color: var(--text-high);
}

.mode-chip.active {
  background: var(--theme-primary);
  color: #000;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* === Circular Timer === */
.timer-container {
  position: relative;
  width: 300px;
  height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.timer-ring {
  position: absolute;
  top: 0;
  left: 0;
  transform: rotate(-90deg);
}

.ring-track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.05);
  stroke-width: 8;
}

.ring-progress {
  fill: none;
  stroke: var(--theme-primary);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.4s ease;
}

.timer-display {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 500;
  z-index: 2;
  letter-spacing: -2px;
}

.timer-label {
  color: var(--text-med);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* === Controls === */
.controls {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  justify-content: center;
  position: relative;
}

.btn-icon,
.btn-fab {
  cursor: pointer;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-icon:active,
.btn-fab:active {
  transform: scale(0.92);
}

.btn-icon {
  background: transparent;
  color: var(--text-med);
  width: 48px;
  height: 48px;
  border-radius: 50%;
}
.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-high);
}

.btn-fab {
  width: 72px;
  height: 72px;
  border-radius: 24px;
  background: var(--theme-primary);
  color: #000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.btn-fab:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}
.btn-fab .material-symbols-rounded {
  font-size: 32px;
}

/* Iteration Badge */
.iteration-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-med);
  font-size: 0.9rem;
  position: absolute;
  right: 0;
}



/* === Mobile Adjustments === */
@media (max-width: 480px) {
  .timer-container,
  .timer-ring {
    width: 240px;
    height: 240px;
  }
  .timer-ring circle {
    r: 110;
    cx: 120;
    cy: 120;
  }
  .timer-display {
    font-size: 3rem;
  }
  .btn-fab {
    width: 64px;
    height: 64px;
  }
  .iteration-badge {
    position: relative;
    right: auto;
    margin-left: 8px;
  }
  .controls {
    flex-wrap: wrap;
  }
}