/* ---- Reset & Base ---- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: #f8fafc;
    color: #334155;
    min-height: 100vh;
}

/* ---- Header ---- */
.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 2rem;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
}

.board-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#project-filter {
    padding: 0.35rem 0.65rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.8rem;
    font-family: inherit;
    color: #334155;
    background: #ffffff;
    cursor: pointer;
}

#project-filter:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

/* ---- Board Grid ---- */
.board {
    display: flex;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    min-height: calc(100vh - 3.5rem);
    overflow-x: auto;
}

/* ---- Columns ---- */
.column {
    flex: 1;
    min-width: 260px;
    max-width: 340px;
    background: #f1f5f9;
    border-radius: 10px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
}

.column-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.625rem;
    padding: 0 0.2rem;
}

.column-header h2 {
    font-size: 0.8rem;
    font-weight: 600;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.card-count {
    background: #cbd5e1;
    color: #475569;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.1rem 0.4rem;
    border-radius: 10px;
}

.column-cards {
    display: flex;
    flex-direction: column;
    gap: 0.4375rem;
    flex: 1;
    min-height: 40px;
}

/* ---- Cards ---- */
.card {
    background: #ffffff;
    border-radius: 8px;
    padding: 0.5rem 0.65rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    border-left: 3px solid transparent;
    transition: box-shadow 0.15s ease;
    cursor: grab;
}

.card:hover {
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.card:active {
    cursor: grabbing;
}

/* Priority Colors */
.priority-high {
    background: #fef2f2;
    border-left-color: #f87171;
}

.priority-medium {
    background: #fffbeb;
    border-left-color: #fbbf24;
}

.priority-low {
    background: #f0fdf4;
    border-left-color: #4ade80;
}

/* Card Top Row */
.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.375rem;
}

.card-actions {
    display: flex;
    gap: 0.125rem;
    opacity: 0;
    transition: opacity 0.15s ease;
    flex-shrink: 0;
}

.card:hover .card-actions {
    opacity: 1;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    color: #94a3b8;
    padding: 0.1rem 0.25rem;
    border-radius: 3px;
    line-height: 1;
}

.btn-icon:hover {
    background: rgba(0, 0, 0, 0.06);
    color: #475569;
}

.btn-delete:hover {
    color: #ef4444;
}

/* Card Content */
.card-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.2rem;
    line-height: 1.3;
}

.card-description {
    font-size: 0.78rem;
    color: #64748b;
    margin-bottom: 0.3rem;
    line-height: 1.35;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
    font-size: 0.7rem;
}

.card-project {
    background: #e0e7ff;
    color: #4338ca;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-weight: 500;
}

.card-due-date {
    background: #f1f5f9;
    color: #475569;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
}

.card-priority-label {
    color: #94a3b8;
    font-weight: 500;
    margin-left: auto;
}

/* ---- New Card Button ---- */
.btn-new-card {
    width: 100%;
    padding: 0.35rem;
    margin-bottom: 0.5rem;
    background: transparent;
    border: 2px dashed #cbd5e1;
    border-radius: 6px;
    color: #64748b;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-new-card:hover {
    border-color: #94a3b8;
    color: #475569;
    background: rgba(0, 0, 0, 0.02);
}

/* ---- Card Form ---- */
.card-form {
    border-left-color: #94a3b8;
    cursor: default;
    padding: 0.6rem 0.65rem;
}

.card-form .form-group {
    margin-bottom: 0.4rem;
}

.card-form input[type="text"],
.card-form input[type="date"],
.card-form textarea,
.card-form select {
    width: 100%;
    padding: 0.3rem 0.5rem;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 0.8rem;
    font-family: inherit;
    color: #334155;
    background: #ffffff;
}

.card-form input:focus,
.card-form textarea:focus,
.card-form select:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

.card-form textarea {
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 0.375rem;
}

.form-row .form-group {
    flex: 1;
}

.form-buttons {
    display: flex;
    gap: 0.375rem;
    margin-top: 0.2rem;
}

.btn {
    padding: 0.3rem 0.7rem;
    border: none;
    border-radius: 5px;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease;
}

.btn-save {
    background: #6366f1;
    color: #ffffff;
}

.btn-save:hover {
    background: #4f46e5;
}

.btn-cancel {
    background: #e2e8f0;
    color: #475569;
}

.btn-cancel:hover {
    background: #cbd5e1;
}

.form-error {
    color: #ef4444;
    font-size: 0.75rem;
    padding: 0.15rem 0;
}

/* ---- Due Date Reminders ---- */
.reminder {
    margin-top: 0.35rem;
    padding: 0.3rem 0.45rem;
    border-radius: 5px;
    font-size: 0.7rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem;
}

.reminder-text {
    font-weight: 600;
}

.reminder-actions {
    display: flex;
    gap: 0.4rem;
    margin-left: auto;
}

.reminder-link {
    cursor: pointer;
    text-decoration: underline;
    font-weight: 500;
    opacity: 0.85;
}

.reminder-link:hover {
    opacity: 1;
}

.reminder-soon {
    background: #fef3c7;
    color: #92400e;
}

.reminder-soon .reminder-link {
    color: #92400e;
}

.reminder-urgent {
    background: #fee2e2;
    color: #991b1b;
}

.reminder-urgent .reminder-link {
    color: #991b1b;
}

.reminder-overdue {
    background: #fee2e2;
    color: #7f1d1d;
    font-weight: 500;
}

.reminder-overdue .reminder-link {
    color: #7f1d1d;
}

/* Subtle glow on urgent/overdue cards */
.card-urgent {
    box-shadow: 0 0 0 2px rgba(248, 113, 113, 0.3), 0 1px 2px rgba(0, 0, 0, 0.05);
}

.card-due-soon {
    box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.25), 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* ---- Drag Feedback ---- */
.card-ghost {
    opacity: 0.4;
    background: #e2e8f0 !important;
}

.sortable-chosen {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

/* ---- Tab Bar (hidden on desktop) ---- */
.tab-bar {
    display: none;
}

/* ---- Mobile New Card (hidden on desktop) ---- */
.btn-new-card-mobile {
    display: none;
}

/* ---- Move Arrows (hidden on desktop) ---- */
.card-move-arrows {
    display: none;
}

/* ============================================
   MOBILE — max-width: 768px
   ============================================ */
@media (max-width: 768px) {

    /* ---- Header ---- */
    .board-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        padding: 0.6rem 1rem;
    }

    .board-header h1 {
        font-size: 1.1rem;
        text-align: center;
    }

    #project-filter {
        width: 100%;
        padding: 0.5rem 0.65rem;
        font-size: 0.85rem;
    }

    /* ---- Tab Bar ---- */
    .tab-bar {
        display: flex;
        background: #ffffff;
        border-bottom: 1px solid #e2e8f0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab {
        flex: 1;
        min-width: 0;
        padding: 0.65rem 0.25rem;
        border: none;
        background: transparent;
        font-size: 0.75rem;
        font-weight: 600;
        color: #94a3b8;
        text-transform: uppercase;
        letter-spacing: 0.02em;
        cursor: pointer;
        border-bottom: 3px solid transparent;
        text-align: center;
        white-space: nowrap;
        font-family: inherit;
    }

    .tab-active {
        color: #6366f1;
        border-bottom-color: #6366f1;
    }

    .tab-count {
        font-size: 0.65rem;
        background: #e2e8f0;
        color: #64748b;
        padding: 0.05rem 0.3rem;
        border-radius: 8px;
        margin-left: 0.2rem;
    }

    .tab-active .tab-count {
        background: #e0e7ff;
        color: #4338ca;
    }

    /* ---- Board: single column ---- */
    .board {
        flex-direction: column;
        padding: 0.75rem;
        gap: 0;
        min-height: calc(100vh - 8rem);
    }

    .column {
        display: none;
        min-width: unset;
        max-width: unset;
        width: 100%;
        background: transparent;
        padding: 0;
        border-radius: 0;
    }

    .column-visible {
        display: flex;
    }

    .column-header {
        display: none;
    }

    /* ---- New Card buttons ---- */
    .btn-new-card-desktop {
        display: none;
    }

    .btn-new-card-mobile {
        display: block;
        padding: 0.65rem;
        font-size: 0.85rem;
        margin-bottom: 0.625rem;
    }

    /* ---- Cards ---- */
    .card {
        padding: 0.65rem 0.75rem;
        cursor: default;
    }

    .card-title {
        font-size: 0.9rem;
    }

    .card-description {
        font-size: 0.82rem;
    }

    .card-meta {
        font-size: 0.75rem;
    }

    /* Show actions always on mobile (no hover) */
    .card-actions {
        opacity: 1;
    }

    .btn-icon {
        font-size: 1rem;
        padding: 0.4rem 0.5rem;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* ---- Move Arrows ---- */
    .card-move-arrows {
        display: flex;
        gap: 0.35rem;
        margin-top: 0.4rem;
    }

    .btn-move {
        flex: 1;
        padding: 0;
        min-height: 40px;
        border: 1px solid #d1d5db;
        border-radius: 6px;
        background: #ffffff;
        color: #475569;
        font-size: 1rem;
        font-family: inherit;
        cursor: pointer;
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .btn-move:active {
        background: #e0e7ff;
        border-color: #6366f1;
        color: #4338ca;
    }

    .btn-move-disabled {
        opacity: 0.25;
        cursor: default;
    }

    .btn-move-disabled:active {
        background: #ffffff;
        border-color: #d1d5db;
        color: #475569;
    }

    /* ---- Reminders ---- */
    .reminder {
        padding: 0.4rem 0.55rem;
        font-size: 0.75rem;
    }

    .reminder-link {
        padding: 0.25rem 0.1rem;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    /* ---- Form ---- */
    .card-form {
        padding: 0.75rem;
    }

    .card-form input[type="text"],
    .card-form input[type="date"],
    .card-form textarea,
    .card-form select {
        padding: 0.5rem 0.6rem;
        font-size: 0.85rem;
    }

    .form-row {
        flex-direction: column;
        gap: 0.4rem;
    }

    .btn {
        padding: 0.55rem 1rem;
        font-size: 0.85rem;
        min-height: 44px;
    }

    .column-cards {
        gap: 0.5rem;
    }
}