/* ===== Custom Properties ===== */
:root {
  --bg: #F9F5EB;
  --text: #1A3C34;
  --muted: #5A7A70;
  --accent-topic: #1A3C34;
  --accent-prep: #E4A959;
  --accent-speech: #2A5A4E;
  --warning-start: #FF9800;
  --warning-end: #E53935;
  --radius: 12px;
  --radius-pill: 9999px;
  --shadow: 0 4px 12px rgba(0,0,0,0.1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --font-display: 'DM Serif Display', serif;
  --font-body: 'Inter', sans-serif;
}

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

html {
  height: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ===== Stage Visibility ===== */
.stage-idle,
.stage-topic,
.stage-transition,
.stage-prep,
.stage-speech,
.stage-complete {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  max-width: 640px;
  padding: 2rem;
  gap: 1.5rem;
}

body[data-state="idle"] .stage-idle { display: flex; }
body[data-state="topic"] .stage-topic { display: flex; }
body[data-state="transition"] .stage-transition { display: flex; }
body[data-state="prep"] .stage-prep { display: flex; padding-top: 1.5rem; padding-bottom: 5rem; justify-content: flex-start; }
body[data-state="speech"] .stage-speech { display: flex; padding-top: 1.5rem; padding-bottom: 5rem; justify-content: flex-start; }

body[data-state="prep"] {
  justify-content: center;
  align-items: flex-start;
  overflow-y: auto;
}

body[data-state="speech"] {
  justify-content: center;
  align-items: center;
  overflow-y: auto;
}
body[data-state="complete"] .stage-complete { display: flex; }

/* Controls bar visibility */
.controls-bar { display: none; }
body[data-state="topic"] .controls-bar,
body[data-state="prep"] .controls-bar,
body[data-state="speech"] .controls-bar { display: flex; }

/* ===== IDLE Stage ===== */
.app-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5rem);
}

.app-subtitle {
  color: var(--muted);
  font-size: 1.1rem;
  margin-top: -0.5rem;
}

.app-steps {
  display: inline-flex;
  flex-direction: column;
  gap: 0.6rem;
  text-align: left;
  margin-bottom: 0.5rem;
}

.app-step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.05rem;
  font-weight: 500;
}

.app-step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--text);
  color: var(--bg);
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.framework-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.framework-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
}

.btn-help {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--muted);
  background: none;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s var(--smooth);
  padding: 0;
  line-height: 1;
}

.btn-help:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.framework-toggle {
  display: flex;
  background: rgba(0,0,0,0.06);
  border-radius: var(--radius-pill);
  padding: 4px;
  gap: 2px;
}

.toggle-btn {
  padding: 0.6rem 1.2rem;
  border: none;
  background: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--muted);
  transition: all 0.3s var(--smooth);
}

.toggle-btn.active {
  background: var(--text);
  color: var(--bg);
  box-shadow: var(--shadow);
}

.filters {
  display: flex;
  gap: 0.75rem;
}

.filters select {
  padding: 0.5rem 1rem;
  border: 1.5px solid rgba(0,0,0,0.12);
  border-radius: var(--radius);
  background: white;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text);
  cursor: pointer;
}

.btn-start {
  padding: 1rem 3rem;
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 1rem;
  transition: transform 0.2s var(--spring), box-shadow 0.2s;
  box-shadow: var(--shadow);
}

.btn-start:hover {
  transform: scale(1.05);
}

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

/* ===== TOPIC Stage ===== */
.topic-display {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.topic-text {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 2.5rem);
  line-height: 1.3;
  animation: topic-reveal 0.5s var(--spring) both;
}

.progress-bar-container {
  width: 100%;
  max-width: 400px;
  height: 4px;
  background: rgba(0,0,0,0.08);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: var(--text);
  border-radius: 2px;
  transition: none;
}

/* ===== TRANSITION Stage ===== */
.stage-transition {
  position: fixed;
  inset: 0;
  background: rgba(26,60,52,0.92);
  color: white;
  z-index: 100;
  max-width: none;
}

.transition-content {
  text-align: center;
}

.transition-topic {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.5vw, 2.2rem);
  line-height: 1.4;
  background: rgba(255,255,255,0.12);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  max-width: 500px;
  margin-bottom: 2rem;
}

.transition-label {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.transition-countdown {
  font-family: var(--font-display);
  font-size: clamp(4rem, 15vw, 8rem);
  display: block;
  animation: countdown-pop 0.3s var(--spring);
}

/* ===== PREP Stage ===== */
.topic-card {
  background: white;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
}

.topic-card-text {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.5vw, 2.2rem);
  line-height: 1.4;
}

.timer-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timer-svg {
  width: 120px;
  height: 120px;
}

.timer-bg {
  stroke: rgba(0,0,0,0.08);
  fill: none;
  stroke-width: 8;
}

.timer-ring {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 565.49;
  stroke-dashoffset: 0;
  transition: stroke 0.3s;
}

body[data-state="prep"] .timer-ring {
  stroke: var(--accent-prep);
}

body[data-state="speech"] .timer-ring {
  stroke: var(--accent-speech);
}

body[data-state="speech"] .timer-ring.warning {
  stroke: var(--warning-start);
}

body[data-state="speech"] .timer-ring.critical {
  stroke: var(--warning-end);
  animation: pulse 1s ease-in-out infinite;
}

.timer-display {
  position: absolute;
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ===== Framework Stepper (PREP) ===== */
.framework-stepper {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  text-align: left;
}

.step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  transition: background 0.3s var(--smooth), opacity 0.3s;
  opacity: 0.4;
}

.step.active {
  opacity: 1;
  background: rgba(228,169,89,0.12);
}

.step.completed {
  opacity: 0.7;
}

.step-letter {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  background: rgba(0,0,0,0.08);
  color: var(--muted);
  transition: background 0.3s, color 0.3s;
  flex-shrink: 0;
}

.step.active .step-letter {
  background: var(--accent-prep);
  color: white;
}

.step-content {
  display: flex;
  flex-direction: column;
}

.step-label {
  font-weight: 600;
  font-size: 0.95rem;
}

.step-hint {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ===== Framework Compact (SPEECH) ===== */
.framework-compact {
  font-size: 2rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 2px;
}

.framework-compact .step-ref {
  transition: color 0.3s;
}

.framework-compact .step-ref.active {
  color: var(--accent-speech);
}

/* ===== COMPLETE Stage ===== */
.complete-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  animation: bounce-in 0.6s var(--spring) both;
}

.stats-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  text-align: left;
}

.stats-card p {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.stats-card p:last-child {
  margin-bottom: 0;
}

.complete-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-again {
  padding: 0.8rem 2rem;
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-pill);
  font-weight: 600;
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.2s var(--spring);
}

.btn-settings-link {
  background: none;
  border: none;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

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

/* ===== Controls Bar ===== */
.controls-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  padding-bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
  background: rgba(249,245,235,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(0,0,0,0.06);
  z-index: 50;
}

.ctrl-btn {
  padding: 0.5rem 1rem;
  border: 1.5px solid rgba(0,0,0,0.15);
  background: white;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.stage-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(0,0,0,0.15);
  transition: background 0.3s, transform 0.3s var(--spring);
}

.dot.active {
  background: var(--text);
  transform: scale(1.3);
}

/* ===== Confetti ===== */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 200;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  top: -10px;
  animation: confetti-fall 3s linear forwards;
}

/* ===== Keyframe Animations ===== */
@keyframes topic-reveal {
  0% { transform: scale(0.85); opacity: 0; }
  70% { transform: scale(1.02); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes countdown-pop {
  0% { transform: scale(1.3); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes bounce-in {
  0% { transform: scale(0.3); opacity: 0; }
  50% { transform: scale(1.05); }
  70% { transform: scale(0.95); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

@keyframes confetti-fall {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* ===== Help Overlay ===== */
.help-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  z-index: 300;
  background: var(--bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.25s var(--smooth), visibility 0.25s;
}

.help-overlay.active {
  visibility: visible;
  opacity: 1;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.help-page {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

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

.help-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
}

.btn-help-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.06);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: background 0.2s;
}

.btn-help-close:hover {
  background: rgba(0,0,0,0.12);
}

.help-intro {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.help-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.help-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 0.25rem;
}

.help-card-tagline {
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 1rem;
}

.help-steps {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.help-step {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.help-letter {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--text);
  color: var(--bg);
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.help-step div {
  font-size: 0.9rem;
  line-height: 1.5;
}

.help-step strong {
  font-weight: 600;
}

.help-example {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(0,0,0,0.08);
}

.help-example-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 0.5rem;
}

.help-example ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.help-example li {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text);
  padding-left: 0.25rem;
}

/* ===== Responsive ===== */
@media (min-width: 640px) {
  .timer-svg { width: 150px; height: 150px; }
  .timer-display { font-size: 1.8rem; }
}

@media (min-width: 1024px) {
  .timer-svg { width: 180px; height: 180px; }
  .timer-display { font-size: 2rem; }
  .controls-bar {
    max-width: 640px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: var(--radius) var(--radius) 0 0;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}