/* CSS Variables */
:root {
    --color-brand-primary: #ed6033;
    --color-brand-teal: #5dc6ad;
    --color-brand-blue: #5da3c6;
    --color-brand-teal-light: #eaf7f4;
    --color-brand-orange-light: #fef3c7;
    --color-brand-blue-light: #dbeafe;
    --background: #f7f3f2;
    --background-secondary: #ffffff;
    --color-deep-void: #121314;
    --color-graphite-core: #222326;
    --color-steel-gray: #878c8f;
    --color-lunar-dust: #e2dedc;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e8e8e8;
    --radius: 8px;
    --radius-sm: 6px;
    --color-success: #065f46;
    --color-warning: #92400e;
    --color-info: #1e40af;
    --color-danger: #dc2626;
    --color-danger-light: #fee2e2;
}

/* Dark Mode */
:root.dark {
    --background: #0f1012;
    --background-secondary: #1a1b1e;
    --text-primary: #f0f0f0;
    --text-secondary: #9ca3af;
    --border-color: #2e3035;
    --color-brand-teal-light: rgba(93, 198, 173, 0.15);
    --color-brand-orange-light: rgba(237, 96, 51, 0.15);
    --color-brand-blue-light: rgba(93, 163, 198, 0.15);
    --color-danger-light: rgba(220, 38, 38, 0.15);
    --color-success: #5dc6ad;
    --color-warning: #ed6033;
    --color-info: #5da3c6;
}

/* Dark Mode Particle Background */
:root.dark body::before,
:root.dark body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}

:root.dark body::before {
    background-image: radial-gradient(
            2px 2px at 20px 30px,
            var(--color-brand-primary) 1px,
            transparent 1px
        ),
        radial-gradient(
            2px 2px at 40px 70px,
            var(--color-brand-teal) 1px,
            transparent 1px
        ),
        radial-gradient(
            1.5px 1.5px at 50px 160px,
            var(--color-brand-blue) 1px,
            transparent 1px
        ),
        radial-gradient(
            2px 2px at 90px 40px,
            var(--color-brand-primary) 1px,
            transparent 1px
        ),
        radial-gradient(
            1.5px 1.5px at 130px 80px,
            var(--color-brand-teal) 1px,
            transparent 1px
        ),
        radial-gradient(
            2px 2px at 160px 120px,
            var(--color-brand-blue) 1px,
            transparent 1px
        );
    background-size: 200px 200px;
    animation: particleFloat 20s linear infinite;
    opacity: 0.5;
}

:root.dark body::after {
    background-image: radial-gradient(
            1.5px 1.5px at 25px 45px,
            var(--color-brand-teal) 1px,
            transparent 1px
        ),
        radial-gradient(
            1.5px 1.5px at 75px 95px,
            var(--color-brand-primary) 1px,
            transparent 1px
        ),
        radial-gradient(
            1px 1px at 125px 25px,
            var(--color-brand-blue) 1px,
            transparent 1px
        ),
        radial-gradient(
            1.5px 1.5px at 175px 145px,
            var(--color-brand-teal) 1px,
            transparent 1px
        );
    background-size: 250px 200px;
    animation: particleFloat 30s linear infinite reverse;
    opacity: 0.35;
}

@keyframes particleFloat {
    0% {
        transform: translateY(0) translateX(0);
    }
    50% {
        transform: translateY(-50px) translateX(25px);
    }
    100% {
        transform: translateY(0) translateX(0);
    }
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Base Typography */
body {
    font-family:
        "DM Sans",
        system-ui,
        -apple-system,
        "Segoe UI",
        Roboto,
        "Helvetica Neue",
        Arial,
        sans-serif;
    font-size: 14px;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

h1,
h2 {
    font-weight: 600;
    color: var(--text-primary);
}

h1 {
    font-size: 32px;
    margin-bottom: 20px;
}

h2 {
    font-size: 24px;
    margin-bottom: 16px;
}

h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

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

a:hover {
    text-decoration: underline;
}

/* App Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 220px;
    background-color: var(--background);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    display: block;
    padding: 20px;
}

.sidebar-header a {
    text-decoration: none;
}

.sidebar-header h1 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-brand-primary);
    margin: 0;
    line-height: 1;
}

.app-version {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.app-version:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.sidebar-nav {
    flex: 1;
    padding: 12px;
    overflow-y: auto;
}

.sidebar-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: background-color 0.15s;
}

.sidebar-nav a:hover {
    background-color: var(--background-secondary);
    text-decoration: none;
}

.sidebar-nav a.active {
    background-color: var(--color-brand-teal-light);
    color: var(--color-success);
}

.sidebar-nav i {
    font-size: 18px;
    opacity: 0.7;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section:last-child {
    margin-bottom: 0;
}

.nav-section-header {
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    padding: 0 12px;
    margin-bottom: 8px;
    opacity: 0.6;
}

.sidebar-footer {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-user img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sidebar-user-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.sidebar-user .theme-toggle {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
}

.btn-signout {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 36px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
    text-decoration: none;
}

.btn-signout:hover {
    background-color: var(--background);
    border-color: var(--color-brand-primary);
    color: var(--color-brand-primary);
    text-decoration: none;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 220px;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: opacity 0.15s;
    text-decoration: none;
}

.btn:hover {
    opacity: 0.9;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-brand-primary);
    color: white;
}

.btn-secondary {
    background-color: var(--background-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-teal {
    background-color: var(--color-brand-teal);
    color: white;
}

.btn-approve {
    background-color: var(--color-brand-teal);
    color: white;
}

.btn-reject {
    background-color: transparent;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.btn-reject:hover {
    background-color: var(--color-danger-light);
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-danger:disabled {
    background-color: var(--background-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    cursor: not-allowed;
    opacity: 1;
}

.btn-delete {
    background-color: var(--background-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-delete:hover {
    background-color: var(--color-danger);
    color: white;
    border-color: var(--color-danger);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-sm {
    font-size: 11px;
    padding: 2px 8px;
}

.badge-success {
    background-color: var(--color-brand-teal-light);
    color: var(--color-success);
}

.badge-warning {
    background-color: var(--color-brand-orange-light);
    color: var(--color-warning);
}

.badge-info {
    background-color: var(--color-brand-blue-light);
    color: var(--color-info);
}

.badge-draft {
    background-color: var(--color-brand-orange-light);
    color: var(--color-warning);
}

.badge-approved,
.badge-sent {
    background-color: var(--color-brand-blue-light);
    color: var(--color-info);
}

.badge-paid {
    background-color: var(--color-brand-teal-light);
    color: var(--color-success);
}

.badge-failed,
.badge-rejected {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

/* Cards */
.card {
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 16px 24px;
}

/* List Group */
.list-group {
    list-style: none;
}

.list-group-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

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

.list-group-item:hover {
    background-color: var(--background);
}

/* Text Utilities */
.text-muted {
    color: var(--text-secondary);
}

.text-sm {
    font-size: 12px;
}

.text-right {
    text-align: right;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.theme-toggle:hover {
    background-color: var(--background-secondary);
    border-color: var(--color-brand-primary);
    color: var(--color-brand-primary);
}

.theme-toggle i {
    font-size: 18px;
}

/* Hide icons based on theme */
.theme-toggle .ph-moon {
    display: block;
}

.theme-toggle .ph-sun {
    display: none;
}

:root.dark .theme-toggle .ph-moon {
    display: none;
}

:root.dark .theme-toggle .ph-sun {
    display: block;
}