/* ===========================
   Servaio QuickShare - Modern Theme
   Color Palette inspired by Servaio brand
   =========================== */

:root {
    /* Primary Colors - Servaio Blues */
    --primary-blue: #2B7FE5;
    --primary-blue-dark: #1E5DB8;
    --primary-blue-light: #4A9BFF;
    --accent-blue: #6CB4FF;
    --primary-color: #2B7FE5;

    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F8F9FA;
    --gray-100: #F1F3F5;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #CED4DA;
    --gray-500: #ADB5BD;
    --gray-600: #6C757D;
    --gray-700: #495057;
    --gray-800: #343A40;
    --gray-900: #212529;

    /* Semantic Colors */
    --success: #28A745;
    --warning: #FFC107;
    --danger: #DC3545;
    --info: #17A2B8;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--gray-800);
    background-color: var(--gray-50);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-bottom: 80px;
    position: relative;
}

/* ===========================
   Navigation Bar
   =========================== */

.navbar {
    background: linear-gradient(135deg, var(--white) 0%, var(--gray-50) 100%) !important;
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200) !important;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--primary-blue) !important;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform var(--transition-fast);
}

.navbar-brand:hover {
    transform: translateY(-2px);
    color: var(--primary-blue-dark) !important;
}

.navbar-brand .logo {
    height: 36px;
    width: 36px;
}

.nav-link {
    color: var(--gray-700) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue) !important;
    background-color: var(--gray-100);
}

.nav-link.active {
    color: var(--primary-blue) !important;
    background-color: var(--gray-100);
}

.navbar-text {
    color: var(--gray-700);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    background-color: var(--gray-100);
    border-radius: var(--radius-sm);
}

/* ===========================
   Main Content Area
   =========================== */

.container {
    flex: 1;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

main {
    padding-bottom: 3rem;
}

/* ===========================
   Hero Section (Homepage)
   =========================== */

.hero-section {
    text-align: center;
    padding: 4rem 1rem;
    background: linear-gradient(135deg, rgba(43, 127, 229, 0.05) 0%, rgba(108, 180, 255, 0.05) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: 3rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
}

/* ===========================
   Features Section
   =========================== */

.features-section .feature-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    height: 100%;
}

.features-section .feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.features-section .feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.features-section .feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
}

.features-section .feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 0;
}

/* ===========================
   Page Headers
   =========================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--gray-900);
    font-weight: 700;
}

h1 {
    font-size: 2.25rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 1.875rem;
    margin-bottom: 1.25rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* ===========================
   Cards
   =========================== */

.card {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    background: var(--white);
    overflow: hidden;
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-text {
    color: var(--gray-600);
    line-height: 1.6;
}

.card.border-primary {
    border-color: var(--primary-blue) !important;
    border-width: 2px;
    background: linear-gradient(135deg, var(--white) 0%, rgba(43, 127, 229, 0.03) 100%);
}

.card.border-success {
    border-color: var(--success) !important;
    border-width: 2px;
    background: linear-gradient(135deg, var(--white) 0%, rgba(40, 167, 69, 0.03) 100%);
}

/* ===========================
   Badges
   =========================== */

.badge {
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    letter-spacing: 0.025em;
}

.badge.bg-primary {
    background-color: var(--primary-blue) !important;
    color: var(--white);
}

.badge.bg-success {
    background-color: var(--success) !important;
}

.badge.bg-warning {
    background-color: var(--warning) !important;
    color: var(--gray-900);
}

.badge.bg-danger {
    background-color: var(--danger) !important;
}

.badge.bg-info {
    background-color: var(--info) !important;
}

.badge.bg-dark {
    background-color: var(--gray-800) !important;
}

/* ===========================
   Buttons
   =========================== */

.btn {
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border: none;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
}

.btn-outline-primary {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-outline-primary:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.btn-success {
    background: linear-gradient(135deg, #28A745 0%, #218838 100%);
    color: var(--white);
}

.btn-success:hover {
    background: linear-gradient(135deg, #218838 0%, #28A745 100%);
}

.btn-warning {
    background: linear-gradient(135deg, #FFC107 0%, #E0A800 100%);
    color: var(--gray-900);
}

.btn-info {
    background: linear-gradient(135deg, #17A2B8 0%, #138496 100%);
    color: var(--white);
}

.btn-danger {
    background: linear-gradient(135deg, #DC3545 0%, #C82333 100%);
    color: var(--white);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
    box-shadow: none;
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-sm {
    padding: 0.45rem 0.9rem;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

.btn-group .btn {
    margin: 0;
}

/* ===========================
   Forms
   =========================== */

.form-control, .form-select {
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    padding: 0.625rem 0.875rem;
    transition: all var(--transition-fast);
    background-color: var(--white);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(43, 127, 229, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-check-input {
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(43, 127, 229, 0.1);
}

.form-check-label {
    color: var(--gray-700);
    margin-left: 0.5rem;
    cursor: pointer;
}

/* ===========================
   Alerts
   =========================== */

.alert {
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-sm);
    padding: 1rem 1.25rem;
}

.alert-info {
    background-color: rgba(23, 162, 184, 0.1);
    color: #0C5460;
    border-left: 4px solid var(--info);
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.1);
    color: #155724;
    border-left: 4px solid var(--success);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-left: 4px solid var(--warning);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: #721C24;
    border-left: 4px solid var(--danger);
}

/* ===========================
   Tables
   =========================== */

.table {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
}

.table thead th {
    font-weight: 600;
    border: none;
    padding: 1rem;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.table tbody tr {
    transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
    background-color: var(--gray-50);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-200);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--gray-50);
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: linear-gradient(135deg, var(--white) 0%, var(--gray-50) 100%);
    padding: 0.75rem 0;
    border-top: 1px solid var(--gray-200);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.footer .container {
    padding-top: 0;
    padding-bottom: 0;
}

.footer .row {
    font-size: 0.875rem;
}

.footer a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

/* ===========================
   Utility Classes
   =========================== */

.text-muted {
    color: var(--gray-600) !important;
}

.bg-light {
    background-color: var(--gray-50) !important;
}

.border-top {
    border-top: 1px solid var(--gray-200) !important;
}

.box-shadow {
    box-shadow: var(--shadow-md);
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .navbar-brand {
        font-size: 1.15rem;
    }

    .card-body {
        padding: 1rem;
    }
}

/* ===========================
   Loading States
   =========================== */

.btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ===========================
   Focus States for Accessibility
   =========================== */

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(43, 127, 229, 0.25);
    outline: none;
}

/* ===========================
   File Explorer
   =========================== */

.drop-zone {
    border: 3px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    background: var(--gray-50);
    transition: all var(--transition-base);
    cursor: pointer;
}

.drop-zone:hover {
    border-color: var(--primary-blue);
    background: rgba(43, 127, 229, 0.05);
}

.drop-zone-active {
    border-color: var(--primary-blue);
    background: rgba(43, 127, 229, 0.1);
    transform: scale(1.02);
}

.drop-zone-content {
    pointer-events: none;
}

.drop-zone-compact {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-md);
    text-align: center;
    background: var(--gray-50);
    transition: all var(--transition-base);
    cursor: pointer;
}

.drop-zone-compact:hover {
    border-color: var(--primary-blue);
    background: rgba(43, 127, 229, 0.05);
}

.drop-zone-compact.drop-zone-active {
    border-color: var(--primary-blue);
    background: rgba(43, 127, 229, 0.1);
    border-style: solid;
}

.file-explorer {
    display: flex;
    flex-direction: column;
}

/* Header Row */
.explorer-header {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--primary-blue-dark);
    gap: 1rem;
}

.explorer-header .explorer-icon {
    font-size: 1.75rem;
    width: 40px;
    text-align: center;
    flex-shrink: 0;
}

.explorer-header .explorer-name {
    flex: 1;
    font-weight: 600;
    word-break: break-word;
}

.explorer-header .explorer-meta {
    display: flex;
    gap: 1rem;
    min-width: 200px;
    justify-content: flex-end;
}

.explorer-header .explorer-actions-placeholder {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    width: 120px; /* Match the width of action buttons */
    flex-shrink: 0;
}

.explorer-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    transition: background-color var(--transition-fast);
}

.explorer-item:hover {
    background-color: var(--gray-50);
}

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

.explorer-back {
    background-color: var(--gray-100);
    font-weight: 600;
    padding: 0.375rem 1.5rem; /* Half height */
}

.explorer-back .explorer-name {
    font-size: 1.25rem;
}

.explorer-link {
    display: flex;
    align-items: center;
    flex: 1;
    text-decoration: none;
    color: inherit;
    gap: 1rem;
}

.explorer-icon {
    font-size: 1.75rem;
    width: 40px;
    text-align: center;
    flex-shrink: 0;
}

.explorer-icon.folder-icon {
    color: var(--primary-blue);
}

.explorer-icon.file-icon {
    color: var(--gray-600);
}

.explorer-name {
    flex: 1;
    font-weight: 500;
    word-break: break-word;
}

.explorer-meta {
    display: flex;
    gap: 1rem;
    min-width: 280px;
    justify-content: flex-end;
    flex-shrink: 0;
}

.meta-size {
    width: 80px;
    text-align: right;
    display: inline-block;
}

.meta-date {
    width: 140px;
    text-align: right;
    display: inline-block;
}

.explorer-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
    width: 120px;
    flex-shrink: 0;
}

.explorer-item:hover .explorer-actions {
    opacity: 1;
}

.explorer-actions .btn-link {
    padding: 0.25rem 0.5rem;
    text-decoration: none;
}

.explorer-actions .btn-link:hover {
    transform: scale(1.1);
}

/* Folder Drop Target Highlighting */
.explorer-item.folder-drop-target {
    background-color: rgba(43, 127, 229, 0.1);
    border-left: 4px solid var(--primary-blue);
    padding-left: calc(1.5rem - 4px);
}

.explorer-item.folder-drop-target .explorer-icon.folder-icon {
    color: var(--primary-blue-dark);
    transform: scale(1.1);
}

/* Drop Indicator Row */
.explorer-item.drop-indicator {
    background: linear-gradient(90deg, rgba(43, 127, 229, 0.05) 0%, rgba(43, 127, 229, 0.15) 50%, rgba(43, 127, 229, 0.05) 100%);
    border: 2px dashed var(--primary-blue);
    border-radius: var(--radius-sm);
    margin: 0.5rem 1rem;
    padding: 1rem 1.5rem;
    cursor: default;
}

.explorer-item.drop-indicator .explorer-name {
    color: var(--primary-blue);
    font-weight: 600;
}

/* Empty State */
.empty-state-inline {
    border-bottom: 1px solid var(--gray-200);
    background-color: var(--gray-50);
}

/* Breadcrumb Styling */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-item a {
    color: var(--primary-blue);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--gray-700);
    font-weight: 600;
}

/* Responsive Explorer */
@media (max-width: 768px) {
    .explorer-item {
        flex-wrap: wrap;
        padding: 1rem;
    }

    .explorer-meta {
        flex-basis: 100%;
        justify-content: flex-start;
        margin-top: 0.5rem;
        min-width: auto;
    }

    .explorer-actions {
        opacity: 1;
    }
}

/* Bootstrap Icons - Add if not already included */
@import url("https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.0/font/bootstrap-icons.css");