* {
    box-sizing: border-box
}

body {
    margin: 0;
    background: #f7f8fa;
    color: #24324a;
    font: 15px system-ui
}

.container {
    max-width: 1400px;
    margin: auto;
    padding: 24px
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px
}

h1 {
    margin: 0
}

header p {
    color: #7b8798
}

.board {
    display: grid;
    grid-template-columns: repeat(4,minmax(220px,1fr));
    gap: 14px
}

.lane {
    background: #eef1f5;
    border-radius: 9px;
    padding: 12px;
    min-height: 65vh
}

    .lane h2 {
        font-size: 13px;
        background: #dce8fb;
        color: #1656a5;
        display: inline-block;
        padding: 6px;
        border-radius: 4px
    }

        .lane h2 small {
            margin-left: 8px;
            color: #63738b
        }

article {
    background: white;
    padding: 12px;
    border: 1px solid #e0e5ed;
    border-radius: 7px;
    margin: 8px 0;
    box-shadow: 0 1px 3px #0000000a
}

    article p, article small {
        color: #6c7890
    }

.auth {
    max-width: 400px;
    margin: 10vh auto;
    background: white;
    border: 1px solid #e2e7ef;
    border-radius: 12px;
    padding: 28px
}

    .auth label {
        display: block;
        margin: 12px 0 5px
    }

    .auth input {
        width: 100%;
        padding: 11px;
        border: 1px solid #d5dce7;
        border-radius: 6px
    }

    .auth button, header button {
        margin-top: 14px;
        padding: 10px 14px;
        border: 0;
        border-radius: 6px;
        background: #2459b3;
        color: white;
        cursor: pointer
    }

    .auth form button {
        width: 100%
    }

    .auth .google {
        background: #fff;
        color: #24324a;
        border: 1px solid #ccd4e0
    }

.error {
    color: #b42318
}

@media(max-width:900px) {
    .board {
        grid-template-columns: repeat(2,minmax(210px,1fr))
    }
}

@media(max-width:560px) {
    .container {
        padding: 12px
    }

    .board {
        grid-template-columns: 1fr
    }

    .lane {
        min-height: auto
    }
}






.create-task-form {
    display: flex;
    gap: 8px;
    max-width: 520px;
    margin: 0 0 18px;
}

    .create-task-form input {
        flex: 1;
        min-width: 0;
        padding: 10px 12px;
        border: 1px solid #d5dce7;
        border-radius: 7px;
    }

.btn {
    border: 0;
    border-radius: 7px;
    padding: 10px 14px;
    cursor: pointer;
    font-weight: 600;
}

.create-btn,
.logout-btn {
    background: #2459b3;
    color: #fff;
}

.lane-tasks {
    min-height: 120px;
}

.task-card {
    cursor: grab;
}

    .task-card:active {
        cursor: grabbing;
    }

    .task-card.is-dragging {
        opacity: 0.45;
    }

.lane.drag-over {
    outline: 2px dashed #3b82f6;
    outline-offset: -3px;
    background: #e3edff;
}

.task-time {
    display: block;
    margin-top: 12px;
    color: #778398;
    font-size: 12px;
}

.task-error {
    color: #b42318;
}

.task-title-input {
    display: block;
    width: 100%;
    min-width: 0;
    padding: 6px 8px;
    border: 1px solid #3b82f6;
    border-radius: 5px;
    font: inherit;
    color: inherit;
    background: #fff;
    outline: none;
}

.create-task-form {
    display: flex;
    gap: 6px;
    margin: 8px 0 12px;
    width: 100%;
}

    .create-task-form input {
        flex: 1;
        min-width: 0;
        width: 100%;
    }

    .create-task-form .create-btn {
        flex-shrink: 0;
    }

/* คอลัมน์ที่กำลังเป็นจุดวาง */
.lane.drag-over {
    outline: 2px dashed #16a34a;
    outline-offset: -4px;
    background-color: #f0fdf4;
}

/* การ์ดที่กำลังลาก */
.task-card.is-dragging {
    opacity: 0.45;
}

.lane-tasks.drag-over {
    outline: 2px dashed #16a34a;
    outline-offset: -4px;
    background-color: #f0fdf4;
    border-radius: 6px;
}

.task-card.is-dragging {
    opacity: 0.45;
}

.lane-tasks .ui-sortable-placeholder {
    visibility: visible !important;
    border: 2px dashed #22c55e;
    background: rgba(34, 197, 94, 0.12);
    min-height: 48px;
}