@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
    --bg-color: #f6f5f2;
    --bg-elevated: #efede8;
    --surface-bg: #ffffff;
    --surface-hover: #faf9f6;
    --text-main: #141413;
    --text-secondary: #3d3c39;
    --text-muted: #575652;
    --border-color: #e2e0d8;
    --border-strong: #c8c5ba;
    --accent: #1e40af;
    --accent-hover: #1e3a8a;
    --accent-text: #1e40af;
    --accent-subtle: #eff6ff;
    --focus-ring: #1d4ed8;
    --shadow-card: 0 2px 6px rgba(20, 20, 19, 0.04), 0 1px 2px rgba(20, 20, 19, 0.03);
    --shadow-card-hover: 0 8px 20px rgba(20, 20, 19, 0.07), 0 2px 6px rgba(20, 20, 19, 0.04);
    --shadow-modal: 0 24px 48px rgba(20, 20, 19, 0.16), 0 4px 12px rgba(20, 20, 19, 0.08);
    --tag-bg: #f0efe9;
    --tag-text: #3d3c39;
    --danger: #b91c1c;
    --danger-subtle: #fef2f2;
    --danger-border: #fecaca;
    --success: #15803d;
    --success-subtle: #f0fdf4;
    --success-border: #bbf7d0;
    --warning: #b45309;
    --warning-subtle: #fffbeb;
    --warning-border: #fde68a;
    --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Legacy compatibility aliases */
    --primary: var(--accent);
    --primary-hover: var(--accent-hover);
    --secondary: var(--text-secondary);
    --card-bg: var(--surface-bg);
    --card-border: var(--border-color);
    --glass-highlight: var(--surface-hover);
    --glass-bg: var(--surface-bg);
    --glass-border: var(--border-color);
    --error: var(--danger);
    --table-border: var(--border-color);
    --bg-hover: var(--bg-elevated);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0e1014;
        --bg-elevated: #14171d;
        --surface-bg: #181b22;
        --surface-hover: #1e222b;
        --text-main: #f3f2ee;
        --text-secondary: #d0d3dc;
        --text-muted: #9ba1b0;
        --border-color: #262b36;
        --border-strong: #373e4d;
        --accent: #1d4ed8;
        --accent-hover: #1e40af;
        --accent-text: #93c5fd;
        --accent-subtle: #172554;
        --focus-ring: #60a5fa;
        --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.28);
        --shadow-card-hover: 0 10px 24px rgba(0, 0, 0, 0.42);
        --shadow-modal: 0 24px 56px rgba(0, 0, 0, 0.65);
        --tag-bg: #222631;
        --tag-text: #d0d3dc;
        --danger: #f87171;
        --danger-subtle: rgba(185, 28, 28, 0.18);
        --danger-border: rgba(248, 113, 113, 0.35);
        --success: #4ade80;
        --success-subtle: rgba(21, 128, 61, 0.18);
        --success-border: rgba(74, 222, 128, 0.35);
        --warning: #fbbf24;
        --warning-subtle: rgba(180, 83, 9, 0.2);
        --warning-border: rgba(251, 191, 36, 0.35);
    }
}

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

::selection {
    background-color: var(--accent);
    color: #ffffff;
}

html {
    scroll-behavior: smooth;
    color-scheme: light dark;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    font-variant-numeric: tabular-nums;
    line-height: 1.5;
}

:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* -------------------------------------
   TOP HEADER BAR
---------------------------------------- */
header {
    width: 100%;
    background-color: var(--surface-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.15rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-brand-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;
}

.back-portal-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
    white-space: nowrap;
}

.back-portal-btn:hover {
    color: var(--text-main);
    background-color: var(--bg-elevated);
    border-color: var(--border-strong);
}

.back-portal-btn svg,
.back-portal-btn i {
    width: 15px;
    height: 15px;
}

.brand-divider {
    width: 1px;
    height: 24px;
    background-color: var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background-color: var(--accent-subtle);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-text);
    flex-shrink: 0;
}

.logo-icon svg,
.logo-icon i {
    width: 19px;
    height: 19px;
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-main);
    line-height: 1.2;
}

.logo-text p {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 1px;
}

/* -------------------------------------
   MAIN CONTAINER & NAV TABS
---------------------------------------- */
main {
    padding: 1.75rem 2rem 3.5rem;
    flex: 1;
    max-width: 1480px;
    margin: 0 auto;
    width: 100%;
}

.nav-tabs {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background-color: var(--surface-bg);
    padding: 0.35rem;
    border-radius: 9px;
    border: 1px solid var(--border-color);
    width: fit-content;
    margin-bottom: 1.75rem;
    box-shadow: var(--shadow-card);
    overflow-x: auto;
}

.nav-tab {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    padding: 0.5rem 1.1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    text-decoration: none;
    white-space: nowrap;
}

.nav-tab svg,
.nav-tab i {
    width: 16px;
    height: 16px;
}

.nav-tab:hover {
    color: var(--text-main);
    background-color: var(--bg-elevated);
}

.nav-tab.active {
    background-color: var(--accent);
    color: #ffffff !important;
    border-color: var(--accent);
    font-weight: 600;
}

.nav-tab.admin-tab {
    color: var(--danger);
}

.nav-tab.admin-tab:hover {
    background-color: var(--danger-subtle);
    color: var(--danger);
}

.nav-tab.admin-tab.active {
    background-color: var(--danger);
    border-color: var(--danger);
    color: #ffffff !important;
}

/* -------------------------------------
   CARDS & PANELS
---------------------------------------- */
.card {
    background-color: var(--surface-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.015em;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.card-title svg,
.card-title i {
    width: 18px;
    height: 18px;
    color: var(--accent-text);
}

/* Info Box / Guide Panel */
.info-guide-box {
    flex: 1;
    min-width: 300px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem 1.35rem;
}

.info-guide-box h4 {
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.info-guide-box h4 svg,
.info-guide-box h4 i {
    color: var(--accent-text);
    width: 17px;
    height: 17px;
}

.info-guide-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.info-guide-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
}

.info-guide-list li .check-bullet {
    color: var(--success);
    font-weight: 700;
    margin-top: 1px;
    flex-shrink: 0;
}

.info-guide-list li .star-bullet {
    color: var(--warning);
    font-weight: 700;
    margin-top: 1px;
    flex-shrink: 0;
}

.info-guide-list a {
    color: var(--accent-text);
    font-weight: 500;
    text-decoration: underline;
}

/* Upload Area */
.upload-area {
    border: 1px dashed var(--border-strong);
    border-radius: 8px;
    padding: 2rem 1.25rem;
    text-align: center;
    background-color: var(--bg-color);
    transition: border-color 0.15s ease, background-color 0.15s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--accent);
    background-color: var(--surface-hover);
}

.upload-area input[type="file"] {
    display: none;
}

.upload-icon {
    color: var(--accent-text);
    margin-bottom: 0.65rem;
}

/* Control Sub-box (e.g. Period selector in Contables / Admin purge box) */
.control-panel-box {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
}

.form-field-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
}

.form-field-row label {
    width: 65px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.form-select,
.form-input {
    flex: 1;
    background-color: var(--surface-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color 0.15s ease;
}

select,
.form-select,
table .filter-row select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 2.35rem !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23575652' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 15px 15px;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
    cursor: pointer;
}

@media (prefers-color-scheme: dark) {
    select,
    .form-select,
    table .filter-row select {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239ba1b0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    }
}

.form-select:hover,
.form-input:hover {
    border-color: var(--border-strong);
}

.form-select:focus,
.form-input:focus {
    outline: none;
    border-color: var(--focus-ring);
}

/* -------------------------------------
   BUTTONS
---------------------------------------- */
.btn {
    background-color: var(--accent);
    color: #ffffff;
    border: 1px solid var(--accent);
    padding: 0.55rem 1.05rem;
    border-radius: 7px;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, opacity 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    font-size: 0.875rem;
    text-decoration: none;
}

.btn svg,
.btn i {
    width: 16px;
    height: 16px;
}

.btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-elevated);
    color: var(--text-main);
    border-color: var(--border-strong);
}

.btn-success,
.btn-excel {
    background-color: var(--success);
    border-color: var(--success);
    color: #ffffff;
}

.btn-success:hover:not(:disabled),
.btn-excel:hover:not(:disabled) {
    filter: brightness(0.93);
    background-color: var(--success);
    border-color: var(--success);
}

.btn-warning {
    background-color: var(--warning);
    border-color: var(--warning);
    color: #ffffff;
}

.btn-warning:hover:not(:disabled) {
    filter: brightness(0.93);
    background-color: var(--warning);
    border-color: var(--warning);
}

.btn-danger {
    background-color: var(--danger);
    border-color: var(--danger);
    color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
    filter: brightness(0.93);
    background-color: var(--danger);
    border-color: var(--danger);
}

/* -------------------------------------
   TABLES (DATA & FILTERS)
---------------------------------------- */
.table-container {
    overflow-x: auto;
    background-color: var(--surface-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.85rem;
}

th {
    background-color: var(--bg-elevated);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.73rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.75rem 0.85rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 5;
}

th.sortable {
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease, color 0.15s ease;
}

th.sortable:hover {
    background-color: var(--surface-hover);
    color: var(--accent-text);
}

.sort-icon {
    font-size: 0.72rem;
    margin-left: 4px;
    opacity: 0.65;
}

table .filter-row th {
    padding: 0.45rem 0.5rem !important;
    background-color: var(--surface-bg);
    border-bottom: 1px solid var(--border-color);
}

table .filter-row input,
table .filter-row select {
    width: 100%;
    padding: 0.35rem 0.5rem;
    font-size: 0.78rem;
    font-family: inherit;
    border-radius: 5px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    outline: none;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

table .filter-row select {
    padding-right: 2.1rem !important;
    background-position: right 0.6rem center;
    background-size: 13px 13px;
}

table .filter-row input:focus,
table .filter-row select:focus {
    border-color: var(--focus-ring);
    background-color: var(--surface-bg);
}

td {
    padding: 0.7rem 0.85rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
}

tbody tr {
    transition: background-color 0.12s ease;
}

tbody tr:hover {
    background-color: var(--surface-hover);
}

tbody tr:last-child td {
    border-bottom: none;
}

.mono-tag {
    background-color: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--border-color);
    padding: 0.12rem 0.45rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
}

.summary-pill {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
    background-color: var(--bg-color);
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* -------------------------------------
   PIVOT LAYOUT & MATRIX TABLE
---------------------------------------- */
.expenses-layout {
    display: flex;
    flex: 1;
    width: 100%;
    min-height: calc(100vh - 69px);
}

.sidebar-filters {
    width: 300px;
    flex-shrink: 0;
    background-color: var(--surface-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.35rem 1.15rem;
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    overflow-y: auto;
    max-height: calc(100vh - 69px);
    position: sticky;
    top: 69px;
}

.sidebar-title {
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-title svg,
.sidebar-title i {
    color: var(--accent-text);
    width: 17px;
    height: 17px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.filter-group label.group-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.filter-group label.group-label span.btn-link {
    font-size: 0.72rem;
    text-transform: none;
    color: var(--accent-text);
    cursor: pointer;
    font-weight: 500;
}

.filter-group label.group-label span.btn-link:hover {
    text-decoration: underline;
}

.checkbox-list {
    max-height: 145px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 7px;
    padding: 0.45rem 0.55rem;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    padding: 0.1rem 0;
}

.checkbox-item:hover {
    color: var(--text-main);
}

.checkbox-item input[type="checkbox"] {
    accent-color: var(--accent);
    width: 14px;
    height: 14px;
    cursor: pointer;
}

.sidebar-actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.main-content {
    flex: 1;
    padding: 1.75rem 2rem 3.5rem;
    overflow-x: auto;
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.matrix-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--surface-bg);
}

table.matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
    white-space: nowrap;
}

table.matrix-table th,
table.matrix-table td {
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--border-color);
    text-align: right;
    font-family: var(--font-mono);
}

table.matrix-table th {
    font-family: var(--font-sans);
    background-color: var(--bg-elevated);
    color: var(--text-muted);
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.03em;
}

table.matrix-table th.period-header {
    background-color: var(--accent-subtle);
    color: var(--accent-text);
    font-size: 0.78rem;
}

table.matrix-table th.total-header {
    background-color: var(--success-subtle);
    color: var(--success);
    font-size: 0.78rem;
}

table.matrix-table td.row-label,
table.matrix-table th.row-label {
    font-family: var(--font-sans);
    text-align: left;
    font-weight: 600;
    color: var(--text-main);
    background-color: var(--bg-elevated);
    position: sticky;
    left: 0;
    z-index: 10;
    min-width: 260px;
}

tr.row-sueldos td {
    font-weight: 500;
}

tr.row-coste {
    font-weight: 700;
    background-color: var(--accent-subtle);
}

tr.row-coste td {
    border-top: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    color: var(--accent-text);
    font-size: 0.86rem;
}

tr.row-check td {
    font-family: var(--font-sans);
    font-weight: 600;
    background-color: var(--bg-color);
}

.badge-ok {
    background-color: var(--success-subtle);
    color: var(--success);
    border: 1px solid var(--success-border);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.74rem;
    display: inline-block;
}

.badge-error {
    background-color: var(--danger-subtle);
    color: var(--danger);
    border: 1px solid var(--danger-border);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.74rem;
    display: inline-block;
}

/* -------------------------------------
   TOGGLE SWITCH (ADMIN)
---------------------------------------- */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-strong);
    transition: .2s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: #ffffff;
    transition: .2s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--success);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* -------------------------------------
   TOAST NOTIFICATIONS
---------------------------------------- */
.toast-container {
    position: fixed;
    bottom: 1.75rem;
    right: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    z-index: 2000;
}

.toast {
    background-color: var(--surface-bg);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.15rem;
    border-radius: 8px;
    box-shadow: var(--shadow-card-hover);
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.875rem;
    font-weight: 500;
    animation: slideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.success {
    border-left: 4px solid var(--accent);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

.spin {
    animation: spin 1s linear infinite;
}