:root {
    --bg-color: #fff;
    --text-color: #000;
    --link-color: #0000ee;
    --border-color: #999;
    --hr-color: #ccc;
    --subtext-color: #666;
    --input-bg: #fff;
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --link-color: #bb86fc;
    --border-color: #444;
    --hr-color: #333;
    --subtext-color: #aaa;
    --input-bg: #1e1e1e;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
}

h1 {
    font-size: 24px;
    font-weight: normal;
    margin-bottom: 10px;
}

h3 {
    font-size: 16px;
    font-weight: normal;
    margin: 0;
}

a {
    color: var(--link-color);
    text-decoration: underline;
    cursor: pointer;
}

button,
input,
textarea,
select {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    padding: 4px 8px;
    box-sizing: border-box;
}

button {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    vertical-align: middle;
}

textarea {
    width: 100%;
    height: 100px;
    resize: vertical;
}

input[type="text"],
input[type="password"],
input[type="date"],
select {
    width: 100%;
}

hr {
    border: 0;
    border-top: 1px solid var(--hr-color);
    margin: 15px 0;
}

.container {
    width: 100%;
    max-width: 680px;
    margin: 0 auto;
}

.note-item, .pass-item {
    margin: 8px 0;
}

.pass-card, .task-card {
    border: 1px solid var(--border-color);
    padding: 8px;
    margin-bottom: 8px;
}

.small {
    color: var(--subtext-color);
    font-size: 12px;
}

.hidden {
    display: none !important;
}

.actions-bar, .tabs-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.tabs-bar button.active {
    font-weight: bold;
    border-bottom: 2px solid var(--text-color);
}

.auth-card {
    border: 1px solid var(--border-color);
    padding: 15px;
    margin-top: 40px;
    text-align: center;
}

.auth-card input {
    max-width: 200px;
    margin: 10px auto;
    text-align: center;
}

/* ESTILOS DEL CALENDARIO */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    gap: 5px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 15px;
}

.calendar-day-name {
    text-align: center;
    font-weight: bold;
    font-size: 12px;
    padding: 4px 0;
    color: var(--subtext-color);
}

.calendar-cell {
    border: 1px solid var(--border-color);
    min-height: 80px;
    padding: 4px;
    background: var(--input-bg);
    vertical-align: top;
    position: relative;
    overflow: hidden;
    user-select: none;
}

.calendar-cell.today {
    border: 2px solid #ffffff;
}

.calendar-cell.empty {
    background: transparent;
    border-color: transparent;
}

.calendar-date-num {
    font-size: 12px;
    font-weight: bold;
    margin-bottom: 4px;
}

.calendar-task-badge {
    font-size: 10px;
    color: #fff;
    padding: 2px 4px;
    margin-bottom: 2px;
    border-radius: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
    cursor: pointer;
}

/* TOOLTIP ESTÉTICO PERSONALIZADO */
#customTooltip {
    position: absolute;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 8px 10px;
    font-size: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    z-index: 1200;
    max-width: 220px;
    pointer-events: none;
    box-sizing: border-box;
}

/* ESTILOS DE MODALES Y MENÚ CONTEXTUAL */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 20px;
    width: 100%;
    max-width: 400px;
    box-sizing: border-box;
}

.context-menu {
    position: absolute;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1100;
    padding: 4px 0;
    min-width: 150px;
}

.context-menu-item {
    padding: 8px 12px;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.context-menu-item:hover {
    background: var(--border-color);
}

/* PANTALLA DE CARGA */
#loadingScreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.4s ease;
}

#loadingScreen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    width: 100%;
    max-width: 280px;
}

.loading-bar-container {
    width: 100%;
    height: 6px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    margin-top: 12px;
    overflow: hidden;
}

.loading-bar-fill {
    width: 0%;
    height: 100%;
    background: var(--text-color);
    transition: width 0.05s linear;
}