/* ==========================================================================
   MyExpenses — Application Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    --color-primary:       #4e73df;
    --color-primary-dark:  #3a56b0;
    --color-success:       #1cc88a;
    --color-danger:        #e74a3b;
    --color-warning:       #f6c23e;
    --color-info:          #36b9cc;

    --sidebar-bg:          #1a1c2e;
    --sidebar-hover:       #2d3154;
    --sidebar-width:       250px;
    --sidebar-text:        #b7b9cc;
    --sidebar-text-active: #ffffff;
    --sidebar-accent:      #4e73df;

    --body-bg:             #f8f9fc;
    --text-color:          #5a5c69;
    --heading-color:       #3a3b45;

    --card-shadow:         0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.09);
    --card-border:         #e3e6f0;

    --topbar-height:       60px;
    --transition-speed:    0.2s;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    background-color: var(--body-bg);
    color: var(--text-color);
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.925rem;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    font-weight: 600;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    z-index: 100;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    transition: transform var(--transition-speed) ease;
}

/* Brand */
.sidebar-brand {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-brand-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 700;
    text-decoration: none;
}

.sidebar-brand-link:hover {
    color: #ffffff;
}

.sidebar-brand-link i {
    font-size: 1.4rem;
    color: var(--sidebar-accent);
}

/* Nav list */
.sidebar-nav {
    list-style: none;
    margin: 0;
    padding: 0.75rem 0;
    flex: 1;
}

.sidebar-nav-item {
    margin: 0;
}

/* Nav links */
.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.25rem;
    color: var(--sidebar-text);
    font-size: 0.875rem;
    border-left: 3px solid transparent;
    transition: background-color var(--transition-speed),
                color var(--transition-speed),
                border-color var(--transition-speed);
    text-decoration: none;
}

.sidebar-nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.sidebar-nav-link.active {
    background-color: rgba(78, 115, 223, 0.12);
    border-left-color: var(--sidebar-accent);
    color: var(--sidebar-text-active);
    font-weight: 500;
}

.sidebar-nav-link i {
    font-size: 1rem;
    width: 1.25rem;
    text-align: center;
    flex-shrink: 0;
}

/* Chevron rotation for collapsible sub-menus */
.sidebar-chevron {
    font-size: 0.7rem;
    transition: transform var(--transition-speed);
}

.sidebar-nav-link[aria-expanded="true"] .sidebar-chevron {
    transform: rotate(180deg);
}

/* Submenu */
.sidebar-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: rgba(0, 0, 0, 0.15);
}

.sidebar-submenu .sub-link {
    padding-left: 3.25rem;
    font-size: 0.825rem;
}

/* Separator */
.sidebar-separator {
    margin: 0.5rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Sidebar footer */
.sidebar-footer {
    padding: 0.85rem 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: auto;
}

.sidebar-user-name {
    color: #ffffff;
    font-size: 0.825rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-email {
    color: var(--sidebar-text);
    font-size: 0.725rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-footer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.5rem;
}

/* Language switcher */
.sidebar-lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.lang-btn {
    color: var(--sidebar-text);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.lang-btn:hover {
    color: #ffffff;
    background-color: var(--sidebar-hover);
}

.lang-btn.lang-active {
    color: #ffffff;
    background-color: var(--sidebar-accent);
}

.lang-divider {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.75rem;
}

/* Logout icon */
.sidebar-logout {
    color: var(--sidebar-text);
    font-size: 1rem;
    transition: color var(--transition-speed);
}

.sidebar-logout:hover {
    color: var(--color-danger);
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --------------------------------------------------------------------------
   Top Bar
   -------------------------------------------------------------------------- */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--topbar-height);
    padding: 0 1.5rem;
    background-color: #ffffff;
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 0.15rem 0.5rem rgba(58, 59, 69, 0.04);
}

.top-bar-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0;
    color: var(--heading-color);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.top-bar-search .form-control {
    width: 220px;
    border-radius: 0.35rem 0 0 0.35rem;
}

.top-bar-search .btn {
    border-radius: 0 0.35rem 0.35rem 0;
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 110;
    display: none;
    font-size: 1.25rem;
    line-height: 1;
    padding: 0.25rem 0.5rem;
    background: #ffffff;
    border: 1px solid var(--card-border);
    border-radius: 0.35rem;
    box-shadow: var(--card-shadow);
}

/* --------------------------------------------------------------------------
   Content Wrapper
   -------------------------------------------------------------------------- */
.content-wrapper {
    flex: 1;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.app-footer {
    padding: 1rem 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: #b7b9cc;
    border-top: 1px solid var(--card-border);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    border: 1px solid var(--card-border);
    border-radius: 0.35rem;
    box-shadow: var(--card-shadow);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #f8f9fc;
    border-bottom: 1px solid var(--card-border);
    font-weight: 600;
    padding: 0.75rem 1.25rem;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.table {
    font-size: 0.875rem;
}

.table thead th {
    border-top: none;
    font-weight: 600;
    color: var(--heading-color);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.85rem 0.75rem;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: rgba(78, 115, 223, 0.02);
}

.table-hover > tbody > tr:hover > * {
    background-color: rgba(78, 115, 223, 0.06);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

.form-label {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--heading-color);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   Flash Messages
   -------------------------------------------------------------------------- */
.flash-message {
    animation: flashFadeIn 0.3s ease-out;
}

.flash-message.fade-out {
    animation: flashFadeOut 0.5s ease-in forwards;
}

@keyframes flashFadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes flashFadeOut {
    from { opacity: 1; transform: translateY(0); }
    to   { opacity: 0; transform: translateY(-10px); }
}

/* --------------------------------------------------------------------------
   Badges & Status Labels
   -------------------------------------------------------------------------- */
.badge-status {
    font-size: 0.725rem;
    font-weight: 600;
    padding: 0.3em 0.65em;
    border-radius: 0.25rem;
}

.badge-paid {
    background-color: var(--color-success);
    color: #ffffff;
}

.badge-pending {
    background-color: var(--color-warning);
    color: #1f2d3d;
}

.badge-overdue {
    background-color: var(--color-danger);
    color: #ffffff;
}

.badge-draft {
    background-color: #858796;
    color: #ffffff;
}

/* --------------------------------------------------------------------------
   Pagination Info
   -------------------------------------------------------------------------- */
.pagination-info {
    font-size: 0.8rem;
}

/* --------------------------------------------------------------------------
   Responsive — Mobile (max-width: 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .top-bar {
        padding-left: 3.5rem; /* room for hamburger */
    }

    .top-bar-search .form-control {
        width: 140px;
    }

    /* Overlay behind open sidebar */
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.45);
        z-index: 99;
        display: none;
    }

    .sidebar-overlay.show {
        display: block;
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .sidebar,
    .sidebar-toggle,
    .top-bar,
    .app-footer,
    .flash-message {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
    }

    .content-wrapper {
        padding: 0 !important;
    }

    body {
        background: #ffffff;
        color: #000000;
    }

    .card {
        box-shadow: none;
        border: 1px solid #cccccc;
    }
}