/* ============================================
   RESPONSIVE & CROSS-BROWSER
   All screen size and browser fixes live here.
   Touch targets, mobile layout, Safari fixes.
   ============================================ */

/* ===== HAMBURGER BUTTON =====
   Hidden on desktop, visible on mobile.
   The three-line icon that opens the sidebar.
   ============================================ */

.sidebar-toggle {
  display: none; /* hidden on desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: transparent;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  margin-right: 8px;
}

.sidebar-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-border);
}

.sidebar-toggle:hover span {
  background: var(--color-text-primary);
}

/* Animate into X when sidebar is open */
.sidebar-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.sidebar-toggle.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.sidebar-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ===== OVERLAY =====
   Dark backdrop behind sidebar on mobile.
   Tap it to close the sidebar.
   ============================================ */

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-fixed) - 1);
  backdrop-filter: blur(2px);
  animation: overlayFadeIn 200ms ease;
}

.sidebar-overlay.is-visible {
  display: block;
}

@keyframes overlayFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}


/* ===== TABLET — 768px to 1024px =====
   Sidebar narrows, content adapts.
   ============================================ */

@media (max-width: 1024px) {
  .sidebar {
    width: 260px;
  }

  .note-content {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .features-grid {
    grid-template-columns: 1fr 1fr;
  }

  .trust-bar {
    grid-template-columns: 1fr 1fr;
  }
}


/* ===== MOBILE — up to 768px =====
   Sidebar slides in over content.
   Single column layout throughout.
   ============================================ */

@media (max-width: 768px) {

  /* Show the hamburger button */
  .sidebar-toggle {
    display: flex;
  }

  /* Sidebar slides off-screen by default */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 280px;
    z-index: var(--z-fixed);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    box-shadow: none;
    overflow-y: auto;
  }

  /* Sidebar slides in when open */
  .sidebar.is-open {
    transform: translateX(0);
    box-shadow: var(--shadow-2xl);
  }

  /* Main content takes full width */
  .main-content {
    width: 100%;
  }

  /* Editor header stacks on small screens */
  .editor-header {
    flex-wrap: wrap;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .note-title-input {
    font-size: var(--font-size-xl);
    width: 100%;
  }

  /* Time tracker hides on very small screens */
  .time-tracker {
    display: none;
  }

  /* Editor actions wrap */
  .editor-actions {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
  }

  /* Toolbar scrolls horizontally instead of wrapping */
  .unified-toolbar {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch; /* smooth scroll on iOS */
    scrollbar-width: none; /* hide scrollbar on Firefox */
    padding: 8px 12px;
  }

  .unified-toolbar::-webkit-scrollbar {
    display: none; /* hide scrollbar on Chrome/Safari */
  }

  /* Writing area full width, less padding */
  .note-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  /* Welcome screen adjustments */
  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .btn-primary-large {
    padding: 12px 24px;
    font-size: 15px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .trust-bar {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 20px;
  }

  /* Template and break cards — 2 columns on mobile */
  .templates-grid,
  .break-activities {
    grid-template-columns: 1fr 1fr !important;
  }

  /* Modal takes full screen on mobile */
  .modal {
    padding: var(--spacing-sm);
    align-items: flex-end; /* slides up from bottom */
  }

  .modal-content {
    max-height: 92vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    width: 100%;
    max-width: 100%;
  }

  /* Quick actions stay in a column */
  .qa-secondary-row {
    grid-template-columns: 1fr 1fr 1fr;
  }

  /* Folders section compact */
  .folders-section {
    padding: 12px;
  }

  /* Trash section compact */
  .trash-section {
    padding: 12px;
  }
}


/* ===== SMALL MOBILE — up to 480px =====
   Extra adjustments for very small phones.
   ============================================ */

@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }

  .trust-bar {
    grid-template-columns: 1fr;
  }

  .templates-grid,
  .break-activities {
    grid-template-columns: 1fr 1fr !important;
  }

  .cta-subtext {
    flex-direction: column;
    gap: 4px;
  }

  .dot-separator {
    display: none;
  }

  /* Privacy dashboard stats stack */
  .privacy-stats-grid {
    grid-template-columns: 1fr;
  }

  .guarantees-grid {
    grid-template-columns: 1fr;
  }
}


/* ===== TOUCH TARGETS =====
   Apple HIG and Material both say
   tap targets should be at least 44px.
   ============================================ */

@media (hover: none) and (pointer: coarse) {
  /* This targets touchscreen devices only */

  .toolbar-btn {
    min-height: 40px;
    min-width: 40px;
    padding: 8px 12px;
  }

  .qa-btn-primary {
    min-height: 48px;
  }

  .qa-btn-secondary {
    min-height: 44px;
  }

  .note-item {
    padding: 14px 13px;
  }

  .folder-item {
    padding: 13px 12px;
  }

  .modal-close {
    width: 44px;
    height: 44px;
  }

  .context-menu-item {
    padding: 14px 16px;
  }
}


/* ===== SAFARI FIXES =====
   Safari has quirks with flexbox,
   gradients, and backdrop-filter.
   ============================================ */

/* Safari needs -webkit- prefix for backdrop-filter */
.modal,
.sidebar-overlay,
.unified-toolbar,
.drawing-toolbar {
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* Safari flexbox gap fix for older versions */
.editor-actions {
  gap: var(--spacing-sm);
}

/* Safari clips gradient text in some contexts —
   adding a z-index forces a new stacking context */
.app-logo-name,
.hero-title .gradient-text,
.gradient-text {
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  position: relative;
  z-index: 0;
}

.note-content {
  min-height: 200px;
  text-align: left;
}

/* Fix Safari 100vh bug — it includes the browser chrome */
.app-container,
.sidebar,
.modal {
  height: 100dvh; /* dvh = dynamic viewport height, fixes Safari */
}

@supports not (height: 100dvh) {
  /* Fallback for browsers that don't support dvh yet */
  .app-container,
  .sidebar,
  .modal {
    height: 100vh;
  }
}


/* ===== FIREFOX FIXES =====
   Firefox renders some things differently.
   ============================================ */

/* Firefox doesn't support -webkit-line-clamp
   the same way — this ensures preview text clips */
@-moz-document url-prefix() {
  .note-item-preview {
    overflow: hidden;
    max-height: 2.8em; /* 2 lines × 1.4 line-height */
  }
}

/* Firefox scrollbar styling */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-dark) var(--color-bg-tertiary);
}


/* ===== PRINT STYLES =====
   Clean single-column output when printing a note.
   ============================================ */

@media print {
  .sidebar,
  .unified-toolbar,
  .editor-header .editor-actions,
  .sidebar-toggle,
  .theme-toggle,
  .drawing-toolbar {
    display: none !important;
  }

  .app-container {
    display: block;
  }

  .main-content {
    width: 100%;
  }

  .note-content {
    max-width: 100%;
    padding: 0;
    font-size: 12pt;
    color: #000;
    background: white;
  }

  .note-title-input {
    font-size: 18pt;
    color: #000;
  }
}


/* ===== REDUCED MOTION =====
   Respects user's OS accessibility setting
   to reduce animations.
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .sidebar {
    transition: none;
  }
}