/* ============================================================
   Blood Pressure Tracker — Clean & Standard Typography
   ============================================================ */

/* --- CSS Custom Properties (Light Mode) --- */
:root {
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-text: #212121;
  --color-text-secondary: #616161;
  --color-primary: #2e7d32;       /* Green — health association */
  --color-primary-dark: #1b5e20;
  --color-accent: #4caf50;
  --color-error: #d32f2f;
  --color-border: #e0e0e0;
  --color-input-bg: #ffffff;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-card-hover: #f9fbe7;

  /* BP category colors */
  --bp-normal: #2e7d32;     
  --bp-elevated: #f9a825;   
  --bp-high1: #ef6c00;      
  --bp-high2: #c62828;      

  /* Normalized Font Sizes */
  --font-size-base: 16px;
  --font-size-heading: 22px;
  --font-size-button: 16px;
  --font-size-input: 16px;
  --font-size-label: 14px;
  --font-size-small: 13px;

  --border-radius: 12px;
  --border-radius-lg: 16px;
  --btn-min-height: 48px;
  --input-height: 48px;

  --big-btn-size: 160px;
  --big-btn-font: 22px;
}

/* --- Dark Mode via body.dark class --- */
body.dark {
  --color-bg: #121212;
  --color-surface: #1e1e1e;
  --color-text: #e0e0e0;
  --color-text-secondary: #9e9e9e;
  --color-primary: #4caf50;
  --color-primary-dark: #66bb6a;
  --color-accent: #66bb6a;
  --color-border: #424242;
  --color-input-bg: #2c2c2c;
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-card-hover: #2a2a2a;

  --bp-normal: #66bb6a;
  --bp-elevated: #ffee58;
  --bp-high1: #ff9800;
  --bp-high2: #ef5350;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.4;
}

/* ============================================================
   View Management — only active view is visible
   ============================================================ */
.view {
  display: none;
}

.view.active {
  display: block;
}

/* ============================================================
   Login View
   ============================================================ */
#view-login.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 32px;
  text-align: center;
}

/* Remove 'display: flex' from plain #view-login if present */
#view-login {
  padding: 32px;
  text-align: center;
}

/* Login View Icon */
.login-icon {
  font-size: 3.5rem; /* Reduced from 8rem */
  margin-bottom: 0.3em;
}

.login-title {
  font-size: var(--font-size-heading);
  color: var(--color-primary);
  margin-bottom: 0.2em;
}

.login-subtitle {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 0.8em;
}

/* Google Sign-In Button */
.btn-google-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: var(--btn-min-height);
  padding: 16px 48px;
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-button);
  color: var(--color-text);
  cursor: pointer;
  box-shadow: 0 2px 8px var(--color-shadow);
  transition: box-shadow 0.2s;
}

.btn-google-login:active {
  box-shadow: 0 4px 16px var(--color-shadow);
}

.google-btn-text {
  margin-left: 8px;
}

/* ============================================================
   Dashboard View
   ============================================================ */
#view-dashboard {
  padding: 16px;
  max-width: 480px;
  margin: 0 auto;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  padding: 16px 0;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

.btn-signout {
  min-height: 48px;
  padding: 12px 24px;
  background: transparent;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  cursor: pointer;
}

.btn-signout:active {
  background: var(--color-bg);
}

/* Big Circular Button */
.big-button-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 0;
}

.btn-big-circle {
  width: var(--big-btn-size);
  height: var(--big-btn-size);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border: none;
  color: #ffffff;
  font-size: var(--big-btn-font);
  cursor: pointer;
  box-shadow: 0 8px 32px rgba(46, 125, 50, 0.3);
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.btn-big-circle:active {
  transform: scale(0.95);
  box-shadow: 0 4px 16px rgba(46, 125, 50, 0.3);
}

/* Big Record Button */
.btn-big-circle .btn-icon {
  font-size: 2.5rem;
  margin-bottom: 4px;
}

.btn-big-circle .btn-text {
  font-size: var(--big-btn-font);
  line-height: 1.2;
}

/* Recent Records */
.recent-section {
  margin-top: 16px;
}

.recent-title {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 8px;
}

.record-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.record-card {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px var(--color-shadow);
  border-left: 8px solid var(--bp-normal); /* default green */
}

.record-card.bp-elevated { border-left-color: var(--bp-elevated); }
.record-card.bp-high1 { border-left-color: var(--bp-high1); }
.record-card.bp-high2 { border-left-color: var(--bp-high2); }

.record-date {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.record-values {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.record-systolic {
  font-size: var(--font-size-heading);
  font-weight: bold;
}

.record-divider {
  font-size: var(--font-size-heading);
  color: var(--color-text-secondary);
}

.record-diastolic {
  font-size: var(--font-size-heading);
  color: var(--color-primary);
}

.record-heart-rate {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-left: auto;
}

/* ============================================================
   Input Form View
   ============================================================ */
#view-input {
  padding: 16px;
  max-width: 480px;
  margin: 0 auto;
}

.input-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding-top: 16px;
}

.btn-back {
  min-height: var(--btn-min-height);
  min-width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  font-size: var(--font-size-button);
  color: var(--color-text);
  cursor: pointer;
}

.input-title {
  font-size: var(--font-size-button);
  flex: 1;
  color: var(--color-primary);
}

.input-group {
  margin-bottom: 24px;
}

.input-label {
  display: block;
  font-size: var(--font-size-label);
  color: var(--color-text);
  margin-bottom: 8px;
}

.input-field {
  width: 100%;
  height: var(--input-height);
  font-size: var(--font-size-input);
  padding: 12px 16px;
  border: 3px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-input-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s;
}

.input-field:focus {
  border-color: var(--color-primary);
}

.input-field.error {
  border-color: var(--color-error);
}

.input-error {
  font-size: var(--font-size-small);
  color: var(--color-error);
  margin-top: 4px;
  min-height: 1.5em;
}

.btn-next {
  display: block;
  width: 100%;
  min-height: var(--btn-min-height);
  padding: 16px;
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-button);
  cursor: pointer;
  box-shadow: 0 4px 12px var(--color-shadow);
}

.btn-next:active {
  background: var(--color-primary-dark);
}

/* ============================================================
   Confirmation Modal (Overlay)
   ============================================================ */
#confirm-modal {
  display: none;          /* hidden by default */
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 16px;
}

#confirm-modal.active {
  display: flex;
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.24);
}

.modal-title {
  font-size: var(--font-size-button);
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 24px;
}

.modal-values {
  text-align: center;
  margin-bottom: 24px;
}

.modal-value-row {
  font-size: var(--font-size-button);
  margin-bottom: 16px;
}

/* Modal Confirmation Numbers */
.modal-value-row .value {
  font-size: 32px; /* Reduced from 80px */
  font-weight: bold;
  color: var(--color-primary);
}

.modal-datetime {
  text-align: center;
  margin-bottom: 24px;
}

.modal-datetime-label {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.modal-datetime-value {
  font-size: var(--font-size-button);
  color: var(--color-text);
}

.btn-datetime-edit {
  display: inline-block;
  min-height: 48px;
  padding: 12px 24px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  cursor: pointer;
  margin-top: 8px;
}

.modal-datetime-picker {
  display: none;
  width: 100%;
  height: var(--input-height);
  font-size: var(--font-size-label);
  padding: 8px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-input-bg);
  color: var(--color-text);
  margin-top: 8px;
}

.modal-datetime-picker.active {
  display: block;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.btn-confirm {
  min-height: var(--btn-min-height);
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-button);
  cursor: pointer;
}

.btn-confirm:active {
  background: var(--color-primary-dark);
}

.btn-cancel {
  min-height: var(--btn-min-height);
  background: transparent;
  color: var(--color-text-secondary);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-small);
  cursor: pointer;
}

.btn-datetime-confirm {
  min-height: 48px;
  padding: 12px 24px;
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  font-size: var(--font-size-small);
  cursor: pointer;
  margin-top: 8px;
}

/* Loading overlay */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
}

.loading-overlay.active {
  display: flex;
}

.spinner {
  width: 64px;
  height: 64px;
  border: 8px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  color: #ffffff;
  font-size: var(--font-size-button);
}

/* ============================================================
   Success View
   ============================================================ */
#view-success.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 32px;
  text-align: center;
}

#view-success {
  padding: 32px;
  text-align: center;
}

.success-icon {
  font-size: 4rem; /* Reduced from 10rem */
  margin-bottom: 0.2em;
}

.success-title {
  font-size: var(--font-size-heading);
  color: var(--color-primary);
  margin-bottom: 0.3em;
}

.success-values {
  font-size: var(--font-size-button);
  color: var(--color-text-secondary);
  margin-bottom: 0.8em;
}

.btn-home {
  min-height: var(--btn-min-height);
  padding: 16px 48px;
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-button);
  cursor: pointer;
}

.btn-home:active {
  background: var(--color-primary-dark);
}

/* ============================================================
   Error display in modal/form
   ============================================================ */
.error-message {
  text-align: center;
  color: var(--color-error);
  font-size: var(--font-size-small);
  margin-bottom: 16px;
}

/* ============================================================
   Dark mode toggle (top-right corner, small)
   ============================================================ */
.dark-mode-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 500;
  min-height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--color-shadow);
}

/* ============================================================
   Responsive — landscape phones and very small screens
   ============================================================ */
@media (max-height: 500px) {
  :root {
    --big-btn-size: 180px;
    --big-btn-font: 36px;
  }

  .btn-big-circle {
    margin: 20px auto;
  }

  .login-icon {
    font-size: 4rem;
    margin-bottom: 0.1em;
  }
}

/* Desktop — keep things centered and not too wide */
@media (min-width: 768px) {
  #view-dashboard, #view-input {
    max-width: 560px;
  }

  .modal-content {
    max-width: 480px;
  }
}