/* ==================== MOBILE-FIRST OPTIMIZATIONS ==================== */
/* Advanced Mobile UX Enhancements for CopilotX */
/* Includes: Touch Optimizations, Gesture Support, Mobile Navigation, Performance */

/* ==================== MOBILE VIEWPORT FIXES ==================== */
:root {
    /* iOS-specific fixes */
    --viewport-height: 100vh;
    --viewport-height-mobile: calc(var(--vh, 1vh) * 100);
    
    /* Safe area for notched devices */
    --safe-top: env(safe-area-inset-top, 0);
    --safe-bottom: env(safe-area-inset-bottom, 0);
    --safe-left: env(safe-area-inset-left, 0);
    --safe-right: env(safe-area-inset-right, 0);
    
    /* Touch targets */
    --tap-target-min: 44px;
    --tap-target-optimal: 48px;
    --tap-target-comfortable: 56px;
    
    /* Mobile spacing */
    --mobile-padding: 16px;
    --mobile-padding-lg: 24px;
    --mobile-gap: 12px;
}

/* Fix for iOS viewport units */
@supports (-webkit-touch-callout: none) {
    .full-height-mobile {
        height: -webkit-fill-available;
        min-height: -webkit-fill-available;
    }
}

/* ==================== TOUCH OPTIMIZATIONS ==================== */
* {
    /* Remove tap highlight on mobile */
    -webkit-tap-highlight-color: transparent;
    
    /* Smooth scrolling on iOS */
    -webkit-overflow-scrolling: touch;
}

/* Improve touch responsiveness */
button, a, input, select, textarea, [role="button"], .clickable {
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

input, textarea, [contenteditable] {
    -webkit-user-select: text;
    user-select: text;
}

/* Prevent text selection on double-tap */
.no-select {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* ==================== MOBILE-OPTIMIZED BUTTONS ==================== */
.btn-touch {
    min-height: var(--tap-target-min);
    min-width: var(--tap-target-min);
    padding: 12px 20px;
    font-size: 16px; /* Prevents zoom on iOS */
    border-radius: 12px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-tap-highlight-color: transparent;
    position: relative;
    overflow: hidden;
}

.btn-touch::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.btn-touch:active::before {
    opacity: 1;
}

.btn-touch:active {
    transform: scale(0.97);
}

/* Large touch target for important actions */
.btn-touch-lg {
    min-height: var(--tap-target-comfortable);
    padding: 16px 28px;
    font-size: 18px;
    border-radius: 14px;
}

/* Small but still touch-friendly */
.btn-touch-sm {
    min-height: 40px;
    padding: 8px 16px;
    font-size: 14px;
}

/* ==================== MOBILE NAVIGATION PATTERNS ==================== */
/* Bottom Navigation Bar */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 8px 0;
    padding-bottom: calc(8px + var(--safe-bottom));
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
    gap: 4px;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 8px 12px;
    min-height: var(--tap-target-min);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: 12px;
    position: relative;
}

.mobile-nav-item:active {
    background: var(--bg-hover);
    transform: scale(0.95);
}

.mobile-nav-item.active {
    color: var(--primary);
}

.mobile-nav-item.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 3px;
    background: var(--primary);
    border-radius: 0 0 3px 3px;
}

.mobile-nav-item i {
    font-size: 22px;
}

.mobile-nav-item span {
    font-size: 11px;
    font-weight: 500;
}

/* Hamburger Menu */
.mobile-hamburger {
    width: var(--tap-target-min);
    height: var(--tap-target-min);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.mobile-hamburger:active {
    background: var(--bg-hover);
}

.mobile-hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.mobile-hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==================== MOBILE DRAWER/SIDEBAR ==================== */
.mobile-drawer {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(85vw, 360px);
    background: var(--bg-primary);
    box-shadow: 2px 0 16px rgba(0, 0, 0, 0.15);
    z-index: 1100;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

.mobile-drawer.open {
    transform: translateX(0);
}

.mobile-drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1090;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

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

/* ==================== MOBILE FORMS ==================== */
.form-mobile input,
.form-mobile textarea,
.form-mobile select {
    /* Prevent iOS zoom on focus */
    font-size: 16px !important;
    min-height: var(--tap-target-min);
    padding: 12px 16px;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    width: 100%;
    transition: all 0.2s ease;
}

.form-mobile input:focus,
.form-mobile textarea:focus,
.form-mobile select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 132, 255, 0.1);
}

.form-mobile textarea {
    min-height: 120px;
    resize: vertical;
    font-family: inherit;
    line-height: 1.5;
}

.form-mobile label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

/* Search input with icon */
.search-input-mobile {
    position: relative;
}

.search-input-mobile input {
    padding-left: 44px;
}

.search-input-mobile i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* ==================== MOBILE CARDS ==================== */
.card-mobile {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.2s ease;
    border: 1px solid var(--border);
}

.card-mobile:active {
    transform: scale(0.98);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.card-mobile-clickable {
    cursor: pointer;
}

.card-mobile-clickable:active {
    background: var(--bg-hover);
}

/* ==================== MOBILE MODALS ==================== */
.modal-mobile {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-mobile.active {
    opacity: 1;
    visibility: visible;
}

.modal-mobile-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-mobile-content {
    position: relative;
    background: var(--bg-primary);
    border-radius: 20px 20px 0 0;
    padding: 24px;
    padding-bottom: calc(24px + var(--safe-bottom));
    max-height: 90vh;
    width: 100%;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-mobile.active .modal-mobile-content {
    transform: translateY(0);
}

/* Pull indicator */
.modal-mobile-handle {
    width: 40px;
    height: 4px;
    background: var(--text-tertiary);
    border-radius: 2px;
    margin: 0 auto 20px;
    opacity: 0.5;
}

/* ==================== MOBILE TABS ==================== */
.tabs-mobile {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 4px;
    margin: -4px;
}

.tabs-mobile::-webkit-scrollbar {
    display: none;
}

.tab-mobile {
    flex-shrink: 0;
    padding: 10px 20px;
    min-height: 40px;
    background: transparent;
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tab-mobile:active {
    transform: scale(0.95);
}

.tab-mobile.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* ==================== MOBILE LISTS ==================== */
.list-mobile {
    list-style: none;
    margin: 0;
    padding: 0;
}

.list-item-mobile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    min-height: var(--tap-target-min);
    border-bottom: 1px solid var(--border);
    transition: background 0.2s ease;
}

.list-item-mobile:active {
    background: var(--bg-hover);
}

.list-item-mobile:last-child {
    border-bottom: none;
}

.list-item-mobile-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 10px;
    flex-shrink: 0;
}

.list-item-mobile-content {
    flex: 1;
    min-width: 0;
}

.list-item-mobile-title {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.list-item-mobile-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.list-item-mobile-action {
    flex-shrink: 0;
    color: var(--text-tertiary);
}

/* ==================== SWIPE ACTIONS ==================== */
.swipeable {
    position: relative;
    overflow: hidden;
}

.swipe-content {
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.swipe-actions {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    z-index: 0;
}

.swipe-action {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    min-width: 80px;
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.swipe-action-delete {
    background: var(--danger);
}

.swipe-action-archive {
    background: var(--warning);
}

/* ==================== MOBILE PULL-TO-REFRESH ==================== */
.pull-to-refresh-container {
    position: relative;
    overflow: hidden;
}

.pull-to-refresh-indicator {
    position: absolute;
    top: -60px;
    left: 0;
    right: 0;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: top 0.3s ease;
}

.pull-to-refresh-container.pulling .pull-to-refresh-indicator {
    top: 0;
}

.pull-to-refresh-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ==================== MOBILE FAB (Floating Action Button) ==================== */
.fab-mobile {
    position: fixed;
    bottom: calc(20px + var(--safe-bottom));
    right: 20px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.15),
        0 8px 24px rgba(0, 132, 255, 0.3);
    color: white;
    font-size: 24px;
    cursor: pointer;
    z-index: 900;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-tap-highlight-color: transparent;
}

.fab-mobile:active {
    transform: scale(0.9);
}

.fab-mobile:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 16px rgba(0, 0, 0, 0.2),
        0 12px 32px rgba(0, 132, 255, 0.4);
}

/* Extended FAB */
.fab-mobile-extended {
    width: auto;
    padding: 0 24px;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
}

/* ==================== MOBILE SNACKBAR/TOAST ==================== */
.toast-mobile {
    position: fixed;
    bottom: calc(80px + var(--safe-bottom));
    left: 16px;
    right: 16px;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 14px 16px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    z-index: 2100;
    transform: translateY(calc(100% + 80px + var(--safe-bottom)));
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-mobile.show {
    transform: translateY(0);
}

.toast-mobile-icon {
    flex-shrink: 0;
    font-size: 20px;
}

.toast-mobile-message {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
}

.toast-mobile-action {
    flex-shrink: 0;
    background: transparent;
    border: none;
    color: var(--primary-light);
    font-weight: 600;
    font-size: 14px;
    padding: 4px 8px;
    cursor: pointer;
}

/* ==================== MOBILE CHIP/TAG ==================== */
.chip-mobile {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    min-height: 32px;
    background: var(--bg-secondary);
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.chip-mobile-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.chip-mobile-delete {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.2s ease;
}

.chip-mobile-delete:active {
    background: var(--bg-hover);
}

/* ==================== MOBILE PERFORMANCE ==================== */
.mobile-optimize {
    /* GPU acceleration */
    transform: translateZ(0);
    will-change: transform;
    
    /* Reduce repaints */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    
    /* Optimize fonts */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Reduce animation complexity on low-end devices */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== LANDSCAPE MODE OPTIMIZATIONS ==================== */
@media (orientation: landscape) and (max-height: 500px) {
    .mobile-modal-content {
        max-height: 85vh;
    }
    
    .mobile-drawer {
        width: min(50vw, 360px);
    }
    
    .fab-mobile {
        bottom: 16px;
        right: 16px;
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
}

/* ==================== MOBILE BREAKPOINTS ==================== */
/* Extra small devices (phones, 375px and down) */
@media (max-width: 374px) {
    :root {
        --mobile-padding: 12px;
        --mobile-gap: 8px;
    }
    
    .card-mobile {
        padding: 12px;
        border-radius: 12px;
    }
    
    .modal-mobile-content {
        padding: 16px;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .mobile-bottom-nav,
    .mobile-drawer,
    .mobile-hamburger,
    .fab-mobile {
        display: none;
    }
}

/* Tablet portrait */
@media (min-width: 768px) and (max-width: 1023px) {
    .card-mobile {
        padding: 20px;
    }
}

/* ==================== SAFE AREA HELPERS ==================== */
.safe-area-top {
    padding-top: var(--safe-top);
}

.safe-area-bottom {
    padding-bottom: var(--safe-bottom);
}

.safe-area-left {
    padding-left: var(--safe-left);
}

.safe-area-right {
    padding-right: var(--safe-right);
}

.safe-area-inset {
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
}