/* Mobile-Optimized CSS for TimeTrack */
/* This file contains mobile-first responsive styles to improve the mobile experience */

/* ===== CSS Variables for Mobile ===== */
:root {
    /* Touch-friendly sizes */
    --mobile-touch-target: 44px;
    --mobile-input-height: 48px;
    --mobile-button-padding: 12px 16px;
    
    /* Spacing */
    --mobile-edge-padding: 16px;
    --mobile-content-padding: 20px;
    
    /* Typography scaling */
    --mobile-base-font: 16px;
    --mobile-small-font: 14px;
    
    /* Z-index layers */
    --z-mobile-header: 100;
    --z-mobile-nav: 300;
    --z-mobile-overlay: 290;
    --z-bottom-nav: 100;
}

/* ===== Base Mobile Styles ===== */
@media (max-width: 768px) {
    /* Prevent horizontal scroll */
    html, body {
        overflow-x: hidden;
        -webkit-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
    }
    
    /* Better viewport handling for mobile browsers */
    .sidebar {
        height: 100dvh !important; /* Use dvh for better mobile support */
        max-height: -webkit-fill-available;
    }
    
    /* Improved mobile header */
    .mobile-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: var(--z-mobile-header);
        background: #ffffff !important; /* Override green background */
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        padding: 8px var(--mobile-edge-padding);
        height: 56px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid rgba(0,0,0,0.08);
    }
    
    /* Ensure content doesn't hide behind fixed header */
    .content {
        padding-top: calc(56px + var(--mobile-content-padding)) !important;
        padding-left: var(--mobile-edge-padding) !important;
        padding-right: var(--mobile-edge-padding) !important;
        padding-bottom: env(safe-area-inset-bottom, 20px);
    }
    
    /* ===== Typography Optimization ===== */
    body {
        font-size: var(--mobile-base-font);
        line-height: 1.6;
    }
    
    h1 {
        font-size: clamp(1.5rem, 5vw, 2rem);
        margin-bottom: 1rem;
    }
    
    h2 {
        font-size: clamp(1.25rem, 4vw, 1.75rem);
        margin-bottom: 0.875rem;
    }
    
    h3 {
        font-size: clamp(1.125rem, 3.5vw, 1.5rem);
        margin-bottom: 0.75rem;
    }
    
    h4, h5, h6 {
        font-size: clamp(1rem, 3vw, 1.25rem);
        margin-bottom: 0.625rem;
    }
    
    /* ===== Mobile Navigation Improvements ===== */
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        width: 85vw;
        max-width: 320px;
        border-radius: 0;
        box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        z-index: var(--z-mobile-nav) !important;
        position: fixed !important;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    /* Mobile navigation overlay */
    .mobile-nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: var(--z-mobile-overlay);
        -webkit-tap-highlight-color: transparent;
    }
    
    .mobile-nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* Mobile menu toggle button */
    .mobile-menu-toggle,
    .mobile-nav-toggle,
    #mobile-nav-toggle {
        min-width: var(--mobile-touch-target);
        min-height: var(--mobile-touch-target);
        display: flex !important;
        align-items: center;
        justify-content: center;
        -webkit-tap-highlight-color: transparent;
        background: none !important;
        border: none !important;
        cursor: pointer;
        padding: 0;
        width: 44px;
        height: 44px;
        flex-direction: column;
        gap: 4px;
        position: relative;
    }
    
    /* Hamburger menu lines - override white color with higher specificity */
    .mobile-menu-toggle span,
    .mobile-nav-toggle span,
    #mobile-nav-toggle span,
    .mobile-header .mobile-nav-toggle span {
        display: block !important;
        height: 3px !important;
        width: 24px !important;
        background-color: var(--primary-color, #667eea) !important;
        border-radius: 2px !important;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        opacity: 1 !important;
        visibility: visible !important;
    }
    
    /* Hover state */
    .mobile-menu-toggle:hover span,
    .mobile-nav-toggle:hover span,
    #mobile-nav-toggle:hover span {
        background-color: var(--primary-gradient-end, #764ba2) !important;
    }
    
    /* Active/open state animations */
    .mobile-menu-toggle.active span:nth-child(1),
    .mobile-nav-toggle.active span:nth-child(1),
    #mobile-nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2),
    .mobile-nav-toggle.active span:nth-child(2),
    #mobile-nav-toggle.active span:nth-child(2) {
        opacity: 0 !important;
        transform: scaleX(0);
    }
    
    .mobile-menu-toggle.active span:nth-child(3),
    .mobile-nav-toggle.active span:nth-child(3),
    #mobile-nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Fallback: If spans still not visible, add pseudo-element hamburger */
    #mobile-nav-toggle::before {
        content: "☰";
        font-size: 24px;
        color: var(--primary-color, #667eea);
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        display: none;
    }
    
    /* Show fallback if spans are hidden */
    #mobile-nav-toggle:not(.active) span:first-child:not(:visible) ~ ::before {
        display: block;
    }
    
    /* Mobile brand/logo styling */
    .mobile-nav-brand {
        font-size: 18px;
        font-weight: 600;
        color: var(--primary-color, #667eea);
    }
    
    .mobile-nav-brand a {
        color: inherit;
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    
    .mobile-logo {
        max-height: 32px;
        width: auto;
    }
    
    /* ===== Touch-Friendly Form Elements ===== */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"],
    input[type="date"],
    input[type="time"],
    input[type="datetime-local"],
    select,
    textarea {
        min-height: var(--mobile-input-height);
        font-size: var(--mobile-base-font);
        padding: 12px;
        border-radius: 8px;
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
    }
    
    /* Prevent zoom on input focus */
    input[type="text"]:focus,
    input[type="email"]:focus,
    input[type="password"]:focus,
    input[type="number"]:focus,
    input[type="tel"]:focus,
    select:focus,
    textarea:focus {
        font-size: var(--mobile-base-font);
    }
    
    /* Touch-friendly buttons */
    .btn,
    button,
    .button,
    input[type="submit"],
    input[type="button"] {
        min-height: var(--mobile-touch-target);
        padding: var(--mobile-button-padding);
        font-size: var(--mobile-base-font);
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Icon buttons need proper sizing */
    .btn-icon,
    .icon-button {
        min-width: var(--mobile-touch-target);
        min-height: var(--mobile-touch-target);
        padding: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    
    /* ===== Table Responsiveness ===== */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin-left: calc(-1 * var(--mobile-edge-padding));
        margin-right: calc(-1 * var(--mobile-edge-padding));
        padding-left: var(--mobile-edge-padding);
        padding-right: var(--mobile-edge-padding);
    }
    
    /* Visual scroll indicator for tables */
    .table-responsive::after {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: 30px;
        background: linear-gradient(to right, transparent, rgba(255,255,255,0.8));
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.3s;
    }
    
    .table-responsive.scrollable::after {
        opacity: 1;
    }
    
    /* Compact table styling */
    .data-table {
        font-size: var(--mobile-small-font);
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 12px;
        white-space: nowrap;
    }
    
    /* Card-based layout for complex data */
    .mobile-card-view {
        display: none;
    }
    
    @media (max-width: 576px) {
        .hide-on-mobile {
            display: none !important;
        }
        
        .show-on-mobile {
            display: block !important;
        }
        
        .mobile-card-view {
            display: block;
        }
        
        .desktop-table-view {
            display: none;
        }
    }
    
    /* ===== Modal Improvements ===== */
    .modal {
        margin: 0;
        max-height: 100dvh;
        height: auto;
    }
    
    .modal-dialog {
        margin: 0;
        max-width: 100%;
        height: 100dvh;
        display: flex;
        align-items: flex-end;
    }
    
    .modal-content {
        border-radius: 16px 16px 0 0;
        max-height: 90dvh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        margin-top: auto;
    }
    
    /* Account for mobile keyboard */
    .modal-open .modal-content {
        padding-bottom: env(keyboard-inset-height, 0);
    }
    
    /* ===== Card and Container Adjustments ===== */
    .card {
        border-radius: 12px;
        padding: var(--mobile-content-padding);
        margin-bottom: 16px;
    }
    
    .card-header {
        margin: calc(-1 * var(--mobile-content-padding));
        margin-bottom: var(--mobile-content-padding);
        padding: 16px var(--mobile-content-padding);
    }
    
    /* ===== Mobile-Specific Components ===== */
    /* Bottom action bar for primary actions */
    .mobile-action-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-light);
        border-top: 1px solid var(--border-color);
        padding: 12px var(--mobile-edge-padding);
        padding-bottom: calc(12px + env(safe-area-inset-bottom, 0));
        display: flex;
        gap: 12px;
        z-index: 90;
    }
    
    .mobile-action-bar .btn {
        flex: 1;
    }
    
    /* Content adjustment when action bar is present */
    .has-mobile-action-bar .content {
        padding-bottom: calc(80px + env(safe-area-inset-bottom, 0)) !important;
    }
    
    /* ===== Time Tracking Specific ===== */
    /* Fix page header on mobile */
    .page-header {
        padding: 1.5rem var(--mobile-edge-padding) !important;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-left {
        text-align: center;
    }
    
    .page-title {
        font-size: clamp(1.5rem, 5vw, 2rem);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        margin-bottom: 0.5rem;
    }
    
    .page-subtitle {
        font-size: 0.875rem;
        opacity: 0.9;
    }
    
    /* Header action buttons */
    .header-actions {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }
    
    .header-actions .btn {
        width: 100%;
        justify-content: center;
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    /* For slightly larger phones, show buttons side by side */
    @media (min-width: 400px) {
        .header-actions {
            flex-direction: row;
        }
        
        .header-actions .btn {
            flex: 1;
        }
    }
    
    /* Timer display and controls */
    .timer-display,
    #timer {
        font-size: clamp(1.5rem, 5vw, 2rem) !important;
    }
    
    .timer-controls {
        gap: 12px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .timer-controls .btn {
        min-width: 120px;
    }
    
    /* Timer card adjustments */
    .timer-card {
        padding: 1.5rem var(--mobile-edge-padding);
    }
    
    /* Stats cards in grid */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    @media (min-width: 480px) {
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    
    /* ===== Performance Optimizations ===== */
    /* Reduce motion for users who prefer it */
    @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
    }
    
    /* ===== Landscape Orientation Handling ===== */
    @media (max-height: 500px) and (orientation: landscape) {
        .mobile-header {
            height: 48px;
        }
        
        .content {
            padding-top: calc(48px + 12px) !important;
        }
        
        .modal-content {
            max-height: 100dvh;
            border-radius: 0;
        }
    }
}

/* ===== Mobile Utilities ===== */
@media (max-width: 768px) {
    /* Spacing utilities */
    .mobile-mt-1 { margin-top: 8px !important; }
    .mobile-mt-2 { margin-top: 16px !important; }
    .mobile-mt-3 { margin-top: 24px !important; }
    .mobile-mb-1 { margin-bottom: 8px !important; }
    .mobile-mb-2 { margin-bottom: 16px !important; }
    .mobile-mb-3 { margin-bottom: 24px !important; }
    
    /* Text alignment */
    .mobile-text-center { text-align: center !important; }
    .mobile-text-left { text-align: left !important; }
    .mobile-text-right { text-align: right !important; }
    
    /* Flexbox utilities */
    .mobile-flex-column { flex-direction: column !important; }
    .mobile-flex-wrap { flex-wrap: wrap !important; }
    
    /* Full width on mobile */
    .mobile-full-width {
        width: 100% !important;
        max-width: 100% !important;
    }
}

/* ===== Improved Focus States for Accessibility ===== */
@media (max-width: 768px) {
    *:focus {
        outline: 3px solid var(--primary-color);
        outline-offset: 2px;
    }
    
    input:focus,
    select:focus,
    textarea:focus {
        outline-offset: 0;
        border-color: var(--primary-color);
    }
}