/* ================================================
   Responsive CSS - Mobile and Tablet Optimizations
   ================================================ */

/* Base responsive breakpoints */
/* xs: 0px and up (mobile phones) */
/* sm: 576px and up (large mobile phones) */
/* md: 768px and up (tablets) */
/* lg: 992px and up (desktops) */
/* xl: 1200px and up (large desktops) */

/* Extra Large Screens (1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .vessels-grid {
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large Screens (992px to 1199px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .vessels-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .header-content {
        gap: var(--spacing-md);
    }
    
    .header-actions {
        gap: var(--spacing-xs);
    }
    
    .header-actions .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

/* Medium Screens (768px to 991px) - Tablets */
@media (max-width: 991px) {
    /* Header adjustments */
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .header-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .app-title {
        font-size: var(--font-size-xl);
    }
    
    /* Stats grid for tablets */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-icon {
        font-size: var(--font-size-2xl);
    }
    
    .stat-value {
        font-size: var(--font-size-2xl);
    }
    
    /* Fleet overview adjustments */
    .section-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .section-actions {
        justify-content: center;
    }
    
    /* Vessel grid for tablets */
    .vessels-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--spacing-md);
    }
    
    /* Modal adjustments */
    .modal-content {
        max-width: 95vw;
        margin: var(--spacing-md);
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-md);
    }
    
    /* Form adjustments */
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .form-actions {
        flex-direction: column-reverse;
        gap: var(--spacing-sm);
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    /* List view for tablets */
    .vessels-grid.list-view {
        grid-template-columns: 1fr;
    }
    
    .vessels-grid.list-view .vessel-card {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    
    .vessels-grid.list-view .vessel-header {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }
    
    .vessels-grid.list-view .vessel-body {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .vessels-grid.list-view .usage-breakdown {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }
}

/* Small Screens (576px to 767px) - Large Mobile */
@media (max-width: 767px) {
    /* Container adjustments */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Header for mobile */
    .header {
        padding: var(--spacing-md) 0;
    }
    
    .app-title {
        font-size: var(--font-size-lg);
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }
    
    .app-title .icon {
        font-size: var(--font-size-2xl);
    }
    
    .app-subtitle {
        font-size: var(--font-size-xs);
    }
    
    .header-actions {
        gap: var(--spacing-xs);
    }
    
    .header-actions .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .header-actions .btn .icon {
        display: none;
    }
    
    /* Main content spacing */
    .main-content {
        padding: var(--spacing-lg) 0;
    }
    
    .fleet-stats {
        margin-bottom: var(--spacing-lg);
    }
    
    /* Stats grid for mobile */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-sm);
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .stat-icon {
        font-size: var(--font-size-xl);
    }
    
    .stat-value {
        font-size: var(--font-size-xl);
    }
    
    .stat-label {
        font-size: var(--font-size-xs);
    }
    
    /* Fleet overview for mobile */
    .fleet-overview {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }
    
    .section-header {
        margin-bottom: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }
    
    .section-title {
        font-size: var(--font-size-lg);
        text-align: center;
    }
    
    .section-actions {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .filter-select {
        flex: 1;
        min-width: 150px;
    }
    
    /* Vessel grid for mobile */
    .vessels-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .vessel-card {
        border-radius: var(--radius-md);
    }
    
    .vessel-header,
    .vessel-body,
    .vessel-footer {
        padding: var(--spacing-md);
    }
    
    .vessel-title {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .vessel-name {
        font-size: var(--font-size-base);
    }
    
    .vessel-info {
        flex-direction: column;
        gap: var(--spacing-xs);
        font-size: var(--font-size-xs);
    }
    
    .usage-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .usage-amount {
        font-size: var(--font-size-lg);
    }
    
    .usage-breakdown {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .breakdown-item {
        padding: var(--spacing-xs);
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: left;
    }
    
    .breakdown-label {
        margin-bottom: 0;
    }
    
    .vessel-footer {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: flex-start;
    }
    
    /* Modal for mobile */
    .modal-content {
        max-width: 100vw;
        max-height: 100vh;
        margin: 0;
        border-radius: 0;
    }
    
    .modal-header {
        padding: var(--spacing-md);
    }
    
    .modal-title {
        font-size: var(--font-size-lg);
    }
    
    .modal-body {
        padding: var(--spacing-md);
        max-height: calc(100vh - 120px);
        overflow-y: auto;
    }
    
    /* Form tabs for mobile */
    .form-tabs {
        margin-bottom: var(--spacing-md);
    }
    
    .tab-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
        flex: 1;
        text-align: center;
    }
    
    /* Form sections for mobile */
    .form-section {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .form-group {
        margin-bottom: var(--spacing-sm);
    }
    
    .form-control {
        padding: var(--spacing-sm);
        font-size: var(--font-size-base);
    }
    
    /* File upload for mobile */
    .upload-area {
        padding: var(--spacing-lg);
    }
    
    .upload-icon {
        font-size: 2rem;
        margin-bottom: var(--spacing-md);
    }
    
    .upload-area h3 {
        font-size: var(--font-size-base);
    }
    
    .upload-area p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-md);
    }
    
    .file-info {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }
    
    .file-details {
        text-align: center;
    }
    
    /* Notification for mobile */
    .notification {
        top: var(--spacing-md);
        right: var(--spacing-md);
        left: var(--spacing-md);
        transform: translateY(-100%);
    }
    
    .notification.show {
        transform: translateY(0);
    }
}

/* Extra Small Screens (0px to 575px) - Small Mobile */
@media (max-width: 575px) {
    /* Even smaller container */
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    /* Header ultra compact */
    .header {
        padding: var(--spacing-sm) 0;
    }
    
    .header-content {
        gap: var(--spacing-sm);
    }
    
    .app-title {
        font-size: var(--font-size-base);
    }
    
    .app-title .icon {
        font-size: var(--font-size-lg);
    }
    
    .app-subtitle {
        display: none; /* Hide subtitle on very small screens */
    }
    
    .header-actions .btn {
        padding: var(--spacing-xs);
        font-size: var(--font-size-xs);
        min-width: auto;
    }
    
    /* Single column stats */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .stat-card {
        padding: var(--spacing-sm);
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-sm);
    }
    
    .stat-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex: 1;
    }
    
    .stat-value {
        font-size: var(--font-size-lg);
    }
    
    .stat-label {
        font-size: var(--font-size-xs);
        margin: 0;
    }
    
    /* Compact fleet overview */
    .fleet-overview {
        padding: var(--spacing-sm);
    }
    
    .section-header {
        margin-bottom: var(--spacing-sm);
        padding-bottom: var(--spacing-sm);
    }
    
    .section-title {
        font-size: var(--font-size-base);
    }
    
    .section-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-select {
        width: 100%;
    }
    
    /* Ultra compact vessel cards */
    .vessels-grid {
        gap: var(--spacing-sm);
    }
    
    .vessel-header,
    .vessel-body,
    .vessel-footer {
        padding: var(--spacing-sm);
    }
    
    .vessel-name {
        font-size: var(--font-size-sm);
    }
    
    .vessel-status {
        font-size: var(--font-size-xs);
    }
    
    .usage-amount {
        font-size: var(--font-size-base);
    }
    
    .usage-quota {
        font-size: var(--font-size-xs);
    }
    
    .breakdown-item {
        padding: var(--spacing-xs);
    }
    
    .breakdown-label,
    .breakdown-value {
        font-size: var(--font-size-xs);
    }
    
    /* Modal full screen */
    .modal-content {
        width: 100vw;
        height: 100vh;
        max-width: none;
        max-height: none;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--spacing-sm);
    }
    
    .modal-title {
        font-size: var(--font-size-base);
    }
    
    /* Form ultra compact */
    .form-section {
        padding: var(--spacing-sm);
    }
    
    .upload-area {
        padding: var(--spacing-md);
    }
    
    .upload-area h3 {
        font-size: var(--font-size-sm);
    }
    
    .upload-area p {
        font-size: var(--font-size-xs);
    }
}

/* Landscape orientation adjustments */
@media (max-width: 767px) and (orientation: landscape) {
    .header {
        padding: var(--spacing-sm) 0;
    }
    
    .header-content {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .app-title {
        flex-direction: row;
        font-size: var(--font-size-base);
    }
    
    .header-actions {
        flex-direction: row;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-xs);
    }
    
    .vessels-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal-content {
        max-height: 90vh;
        margin: 5vh auto;
        border-radius: var(--radius-md);
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 2dppx) {
    .vessel-card,
    .stat-card,
    .modal-content {
        border-width: 0.5px;
    }
    
    .status-indicator {
        width: 6px;
        height: 6px;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn {
        min-height: 44px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .vessel-card {
        padding: var(--spacing-xs);
    }
    
    .vessel-card:hover {
        transform: none; /* Remove hover animations on touch devices */
    }
    
    .stat-card:hover {
        transform: none;
    }
    
    /* Larger form controls */
    .form-control {
        min-height: 44px;
        padding: var(--spacing-md);
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .tab-btn {
        min-height: 44px;
    }
    
    .modal-close {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-spinner {
        animation: none;
        border: 0.25rem solid var(--border-light);
        border-top: 0.25rem solid var(--primary-color);
    }
}

/* Print styles */
@media print {
    .header,
    .header-actions,
    .section-actions,
    .modal,
    .notification {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
    }
    
    .fleet-overview {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .vessel-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
        margin-bottom: var(--spacing-md);
    }
    
    .vessels-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .progress-bar {
        background-color: #000 !important;
    }
    
    .status-indicator.online::after {
        content: " (Online)";
    }
    
    .status-indicator.warning::after {
        content: " (Warning)";
    }
    
    .status-indicator.offline::after {
        content: " (Offline)";
    }
}