/* ============================================================
   正形 PostureMind —— 设计系统
   ============================================================ */

:root {
  --primary: #0F766E;
  --primary-dark: #134E4A;
  --primary-light: #14B8A6;
  --accent: #F59E0B;
  --accent-light: #FCD34D;
  --bg: #FAFAF7;
  --bg-card: #FFFFFF;
  --text: #1E293B;
  --text-light: #64748B;
  --text-lighter: #94A3B8;
  --border: #E2E8F0;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  min-height: 100vh;
  min-height: 100dvh;
  padding-bottom: 80px;
  position: relative;
}

/* ============================================================
   屏幕切换
   ============================================================ */
.screen {
  display: none;
  min-height: 100vh;
  min-height: 100dvh;
  animation: fadeIn 0.4s ease;
}
.screen.active {
  display: block;
}

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

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 12px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
}
.btn:active {
  transform: scale(0.97);
}
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.3);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 20px rgba(15, 118, 110, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: 12px 20px;
}

.btn-large {
  padding: 18px 32px;
  font-size: 17px;
  width: 100%;
  max-width: 320px;
}

/* ============================================================
   首页 Hero
   ============================================================ */
.hero {
  position: relative;
  padding: 60px 24px 40px;
  overflow: hidden;
  background: linear-gradient(165deg, #FEF3C7 0%, #FFFFFF 50%, #CCFBF1 100%);
}
.hero-bg {
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 200%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}
.logo-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}
.logo-emoji {
  font-size: 32px;
}
.logo-text {
  letter-spacing: 4px;
}
.hero-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 16px;
  letter-spacing: -1px;
}
.accent {
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent) 0%, #DC2626 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.accent-strong {
  color: var(--primary-dark);
  font-weight: 700;
}
.hero-subtitle {
  font-size: 17px;
  color: var(--text-light);
  margin: 0 0 32px;
  line-height: 1.7;
}

/* ============================================================
   Feature 网格
   ============================================================ */
.feature-grid {
  padding: 32px 20px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 600px;
  margin: 0 auto;
}
.feature-card {
  background: var(--bg-card);
  padding: 20px 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.feature-icon {
  font-size: 32px;
  margin-bottom: 8px;
}
.feature-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}
.feature-card p {
  margin: 0;
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.5;
}

/* ============================================================
   加载页
   ============================================================ */
.screen-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(165deg, #FEF3C7 0%, #CCFBF1 100%);
}
.screen-loading.active {
  display: flex;
}
.loading-content {
  text-align: center;
}
.logo-pulse {
  font-size: 80px;
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.7; }
}
.app-title {
  font-size: 42px;
  font-weight: 800;
  margin: 16px 0 4px;
  letter-spacing: 8px;
  color: var(--primary-dark);
}
.app-subtitle {
  font-size: 14px;
  color: var(--text-light);
  letter-spacing: 4px;
  margin: 0 0 32px;
  text-transform: uppercase;
}
.loading-text {
  color: var(--text-light);
  font-size: 14px;
}

/* ============================================================
   顶部栏
   ============================================================ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.9);
}
.topbar h2 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}
.btn-back {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text);
  padding: 4px 8px;
  cursor: pointer;
  line-height: 1;
}

/* ============================================================
   拍照页
   ============================================================ */
.capture-instructions {
  padding: 16px 20px 8px;
  text-align: center;
}
.hint {
  margin: 0;
  font-size: 14px;
  color: var(--text-light);
}

.view-tabs {
  display: flex;
  gap: 8px;
  padding: 8px 20px 16px;
  max-width: 500px;
  margin: 0 auto;
}
.view-tab {
  flex: 1;
  padding: 12px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.view-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.capture-area {
  position: relative;
  width: calc(100% - 40px);
  max-width: 500px;
  margin: 0 auto;
  aspect-ratio: 3 / 4;
  background: #1E293B;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
#video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
#poseCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.capture-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pose-guide {
  width: 50%;
  height: 90%;
  opacity: 0.25;
}
.pose-silhouette {
  width: 100%;
  height: 100%;
}
.capture-status {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.6);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  backdrop-filter: blur(10px);
}

.capture-actions {
  display: flex;
  gap: 12px;
  padding: 20px;
  align-items: center;
  justify-content: center;
  max-width: 500px;
  margin: 0 auto;
}
.btn-capture {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  padding: 0;
  background: white !important;
  border: 4px solid var(--primary) !important;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.3) !important;
  position: relative;
  flex-shrink: 0;
}
.capture-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  display: block;
  transition: all 0.2s;
}
.btn-capture:active .capture-icon {
  transform: scale(0.85);
}

.capture-tips {
  padding: 0 20px;
  max-width: 500px;
  margin: 0 auto;
}
.capture-tips details {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
}
.capture-tips summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--primary);
}
.capture-tips ul {
  margin: 12px 0 0;
  padding-left: 20px;
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
}
.capture-tips li strong {
  color: var(--text);
}

/* ============================================================
   结果页
   ============================================================ */
.result-summary {
  padding: 20px;
  text-align: center;
}
.result-summary h2 {
  margin: 0 0 8px;
  font-size: 22px;
}
.result-summary p {
  margin: 0;
  color: var(--text-light);
  font-size: 14px;
}

.result-canvas-wrap {
  width: calc(100% - 40px);
  max-width: 400px;
  margin: 0 auto 20px;
  aspect-ratio: 3 / 4;
  background: #0F172A;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}
#resultCanvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.issues-list {
  padding: 0 20px;
  max-width: 600px;
  margin: 0 auto;
}
.issue-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
}
.issue-card.severity-obvious { border-left-color: var(--danger); }
.issue-card.severity-mild { border-left-color: var(--warning); }
.issue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.issue-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
}
.issue-icon {
  font-size: 22px;
}
.issue-severity {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 600;
}
.issue-severity.severity-obvious { background: #FEE2E2; color: var(--danger); }
.issue-severity.severity-mild { background: #FEF3C7; color: #B45309; }
.issue-severity.severity-check { background: #DBEAFE; color: #1E40AF; }

.issue-desc {
  color: var(--text-light);
  font-size: 13px;
  margin: 0 0 12px;
}

.muscle-section {
  background: #FAFAF7;
  border-radius: 10px;
  padding: 12px;
  margin-top: 10px;
}
.muscle-section.compensating {
  background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
}
.muscle-section.rootcause {
  background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
}
.muscle-label {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.muscle-section.compensating .muscle-label { color: #B91C1C; }
.muscle-section.rootcause .muscle-label { color: #047857; }
.muscle-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.muscle-chip {
  background: white;
  padding: 4px 10px;
  border-radius: 14px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(0,0,0,0.05);
}

.result-actions {
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

/* ============================================================
   训练页
   ============================================================ */
.training-summary {
  padding: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  margin: 16px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.training-summary h3 {
  margin: 0 0 6px;
  font-size: 17px;
}
.training-summary p {
  margin: 0;
  font-size: 13px;
  opacity: 0.9;
  line-height: 1.6;
}

.exercise-list {
  padding: 0 20px;
  max-width: 600px;
  margin: 0 auto;
}
.exercise-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  display: flex;
  gap: 14px;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
}
.exercise-card:active {
  transform: scale(0.98);
}
.exercise-card.done {
  opacity: 0.5;
  background: #F0FDF4;
}
.exercise-thumb {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}
.exercise-info {
  flex: 1;
  min-width: 0;
}
.exercise-name {
  font-weight: 700;
  font-size: 15px;
  margin: 0 0 4px;
}
.exercise-target {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 4px;
}
.exercise-meta {
  font-size: 12px;
  color: var(--text-light);
  display: flex;
  gap: 10px;
}
.exercise-check {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: white;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: transparent;
  transition: all 0.2s;
  font-family: inherit;
}
.exercise-check.checked {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.training-progress {
  padding: 20px;
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
}
.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--success) 100%);
  border-radius: 4px;
  transition: width 0.4s ease;
  width: 0%;
}
.progress-text {
  margin: 0;
  font-size: 13px;
  color: var(--text-light);
}

/* ============================================================
   训练详情
   ============================================================ */
.exercise-detail {
  padding: 20px;
  max-width: 600px;
  margin: 0 auto;
}
.exercise-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.exercise-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
}
.exercise-hero h2 {
  margin: 0 0 8px;
  font-size: 24px;
  position: relative;
}
.exercise-hero .target {
  margin: 0;
  font-size: 14px;
  opacity: 0.9;
  position: relative;
}

.exercise-svg {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-card);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.exercise-svg svg {
  width: 80%;
  height: 80%;
}

.exercise-prescription {
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: center;
  gap: 8px;
}
.prescription-item .num {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-dark);
  display: block;
}
.prescription-item .lbl {
  font-size: 11px;
  color: #92400E;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cues-section h3 {
  margin: 0 0 12px;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.cues-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.cues-list li {
  background: var(--bg-card);
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 8px;
  border-left: 3px solid var(--success);
  font-size: 14px;
  line-height: 1.5;
}
.avoid-list li {
  border-left-color: var(--danger);
  background: #FEF2F2;
}
.avoid-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.avoid-list li::before {
  content: '✗ ';
  color: var(--danger);
  font-weight: 700;
}
.cues-list:not(.avoid-list) li::before {
  content: '✓ ';
  color: var(--success);
  font-weight: 700;
}

.timer-section {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-top: 20px;
  border: 1px solid var(--border);
}
.timer-display {
  font-size: 56px;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  margin: 12px 0;
  letter-spacing: -2px;
}
.timer-controls {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.timer-btn {
  padding: 12px 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: white;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
}
.timer-btn.primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.mark-done-btn {
  width: 100%;
  margin-top: 16px;
  padding: 16px;
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

/* ============================================================
   关于页
   ============================================================ */
.about-content {
  padding: 20px;
  max-width: 600px;
  margin: 0 auto;
}
.about-title {
  font-size: 28px;
  margin: 0 0 16px;
  font-weight: 800;
}
.about-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-light);
  margin: 0 0 24px;
}
.concept-block {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.concept-block h3 {
  margin: 0 0 10px;
  font-size: 17px;
}
.concept-block p {
  color: var(--text-light);
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
}
.comparison {
  background: #FAFAF7;
  border-radius: 10px;
  padding: 12px;
  margin: 12px 0;
}
.comp-row {
  display: flex;
  flex-direction: column;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
}
.comp-row:last-child {
  border-bottom: none;
}
.comp-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.comp-symptom .comp-tag { color: #B91C1C; }
.comp-root .comp-tag { color: #047857; }
.comp-symptom span:last-child { color: #B91C1C; font-weight: 600; font-size: 14px; }
.comp-root span:last-child { color: #047857; font-weight: 600; font-size: 14px; }

.insight {
  background: linear-gradient(135deg, #DBEAFE 0%, #BFDBFE 100%);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px !important;
  color: #1E3A8A !important;
  line-height: 1.6 !important;
  border-left: 3px solid #3B82F6;
}
.logic-list {
  padding-left: 20px;
  color: var(--text-light);
  font-size: 14px;
  line-height: 1.8;
}
.logic-list li strong {
  color: var(--text);
}
.philosophy-footer {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
  font-weight: 500;
}

/* ============================================================
   进度页
   ============================================================ */
.progress-content {
  padding: 20px;
  max-width: 600px;
  margin: 0 auto;
}
.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.history-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
}
.history-date {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 6px;
}
.history-issues {
  font-size: 13px;
  color: var(--text-light);
}
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
}
.empty-state .icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* ============================================================
   底部导航
   ============================================================ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  padding: 8px 0;
  padding-bottom: calc(8px + env(safe-area-inset-bottom));
  z-index: 100;
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  padding: 8px 0;
  cursor: pointer;
  color: var(--text-lighter);
  font-family: inherit;
  font-size: 11px;
  transition: color 0.2s;
}
.nav-item.active {
  color: var(--primary);
}
.nav-icon {
  font-size: 22px;
  filter: grayscale(0.5);
  transition: filter 0.2s;
}
.nav-item.active .nav-icon {
  filter: grayscale(0);
}

/* ============================================================
   Toast
   ============================================================ */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: rgba(15, 23, 42, 0.95);
  color: white;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
  backdrop-filter: blur(10px);
  max-width: 80%;
  text-align: center;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .hero-title {
    font-size: 48px;
  }
}

@media (max-width: 380px) {
  .hero-title {
    font-size: 32px;
  }
  .feature-grid {
    gap: 10px;
  }
}