:root {
    --color-background: #f4f1ea;
    --color-background-food: #FFE5D8;
    --color-white: #ffffff;
    --color-white-subtle: #f8fafc;

    /* Text & Borders */
    --color-text-main: #0f172a;
    --color-text-muted: #596579;
    --color-heading-h1: #123F36;
    --color-heading-h2: #12544F;
    --color-border: #e2e8f0;

    /* Buttons */
    --color-button: #DB9558;
    --color-button-hover: #F2765E;
    --color-delete: #A82020;

    /* Total Cards Colors */
    --color-balance: #123F36;
    --color-income: #486C2F;
    --color-expenses: #8B2626;

    /* Expenses categories */
    --color-food: #DC8665;
    --color-utilities: #138086;
    --color-shopping: #534666;
    --color-rent: #CD7672;

    /* Filter tabs */
    --color-tabs: #2A6B5C;

    /* Box shadow */
    --box-shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05);

    /* Typography */
    --font-weight-bold: 600;
    --font-size-x-small: 12px;
    --font-size-small: 14px;
    --font-size-medium: 16px;
    --font-size-heading-h1: 30px;
    --font-size-heading-h2: 20px;

    /* Paddings */
    --padding-input: 10px 16px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--color-background);
    color: var(--color-text-main);
    padding: 40px 20px;
}

.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    margin-bottom: 25px;
    color: var(--color-heading-h1);
    font-size: var(--font-size-heading-h1);
}

h2 {
    margin-bottom: 15px;
    color: var(--color-heading-h1);
    font-size: var(--font-size-heading-h2);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.app-input,
.app-select {
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: var(--font-size-medium);
    font-family: inherit;
    outline: none;
    background-color: var(--color-white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.app-input {
    flex: 1;
    padding: var(--padding-input);
}

.field-group {
    display: flex;
    width: 100%;
}

.select-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;

    .app-select {
        width: 100%;
        padding: 10px 36px var(--padding-input);


        appearance: none;
        -webkit-appearance: none;
        -moz-appearance: none;
        cursor: pointer;
    }

    .select-icon {
        position: absolute;
        right: 36px;
        pointer-events: none;
        color: var(--color-text-muted);
        font-size: var(--font-size-x-small);
    }
}

.app-input:focus,
.app-select:focus,
.app-btn:focus-visible,
.delete-btn:focus-visible,
.tab-btn:focus-visible,
.app-input:focus-visible,
.app-select:focus-visible {
    border-color: var(--color-tabs);
    box-shadow: 0 0 0 3px rgba(42, 107, 92, 0.18);
    outline: none;
}

.app-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--padding-input);
    border: none;
    border-radius: 20px;
    font-size: var(--font-size-medium);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;

    &:active {
        transform: scale(0.98);
    }
}

#addTransactionBtn {
    background-color: var(--color-button);
    color: var(--color-text-main);

    &:hover {
        background-color: var(--color-button-hover);
    }
}

.transaction-form, .stats-row {
    display: flex;
    margin-bottom: 30px;
}

.transaction-form {
    gap: 20px;

    > .field-group,
    > .select-wrapper {
        flex: 1;
    }

    > .app-input, .app-select {
        margin-right: 20px;
    }
}

.stats-row {
    gap: 20px;

    .stat-card {
        flex: 1;
        background: var(--color-white);
        padding: 20px;
        border-radius: 10px;
        box-shadow: var(--box-shadow-card);
        border-left: 5px solid var(--color-border);

        .label {
            font-size: 12px;
            text-transform: uppercase;
            color: var(--color-text-muted);
            font-weight: var(--font-weight-bold);
            display: block;
            margin-bottom: 5px;
        }

        .value {
            font-size: 28px;
            font-weight: bold;
        }

        &.box-balance {
            border-left-color: var(--color-balance);
            color: var(--color-balance);
        }

        &.box-income {
            border-left-color: var(--color-income);
            color: var(--color-income);
        }

        &.box-expenses {
            border-left-color: var(--color-expenses);
            color: var(--color-expenses);
        }
    }
}

.chart-card {
    background: var(--color-white);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--box-shadow-card);
    margin-bottom: 30px;

    .color-food {
        background-color: var(--color-food);
    }

    .color-utilities {
        background-color: var(--color-utilities);
    }

    .color-shopping {
        background-color: var(--color-shopping);
    }

    .color-rent {
        background-color: var(--color-rent);
    }

    .progress-track {
        display: flex;
        height: 24px;
        width: 100%;
        background-color: var(--color-white-subtle);
        border-radius: 12px;
        overflow: hidden;
        margin: 15px 0;

        .bar-segment {
            height: 100%;
            transition: width 0.4s ease-out;
        }
    }


    .chart-legend {
        display: flex;
        gap: 25px;
        margin-top: 10px;

        .legend-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: var(--font-size-small);
            color: var(--color-text-muted);

            .indicator {
                width: 12px;
                height: 12px;
                border-radius: 50%;
                display: inline-block;
            }
        }
    }
}

.main-workspace {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;

    .data-list {
        list-style: none;

        &:has(.li-headers) {
            display: block;
        }

        li {
            padding: 12px 15px;
            border-bottom: 1px solid var(--color-border);
            display: grid;
            grid-template-columns: 1fr 120px 100px 40px;
            align-items: center;

            &.li-headers {
                span {
                    font-weight: bold;
                }
            }

            &:last-child {
                border-bottom: none;
            }

            .delete-btn {
                color: var(--color-delete);
                background-color: transparent;
                font-size: 20px;
                border: none;
                border-radius: 4px;
                padding: 4px 8px 4px 16px;
                cursor: pointer;
                justify-self: end;
            }

            .transaction-description {
                text-align: left;
            }

            .transaction-amount {
                text-align: right;
                padding-right: 20px;
            }

            .transaction-category {
                text-align: right;
                padding-right: 20px;
            }
        }
    }

    .ledger-section {
        flex: 2;
        background: var(--color-white);
        padding: 20px;
        border-radius: 10px;
        box-shadow: var(--box-shadow-card);

        &[data-empty="true"] {
            .no-transaction-container {
                display: block;
            }

            .data-list:has(.li-headers) {
                display: none;
            }
        }

        .filter-toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
            background-color: var(--color-white-subtle);
            padding: var(--padding-input);
            border-radius: 8px;
            border: 1px solid var(--color-border);

            .search-wrapper {
                position: relative;
                flex: 1 0 auto;
                min-width: 260px;
                max-width: 300px;

                input {
                    width: 100%;
                    padding-right: 36px;
                }

                .delete-btn {
                    position: absolute;
                    right: 18px;
                    top: 50%;
                    transform: translateY(-50%);
                    background: none;
                    border: none;
                    color: var(--color-text-muted);
                    cursor: pointer;
                    font-size: var(--font-size-small);

                    &:hover {
                        color: var(--color-tabs);
                    }
                }
            }

            .filter-tabs {
                display: flex;
                gap: 5px;

                .tab-btn {
                    background: var(--color-white);
                    color: var(--color-text-muted);
                    border: 1px solid var(--color-border);
                    padding: var(--padding-input);
                    font-size: var(--font-size-small);
                    font-weight: var(--font-weight-bold);
                    border-radius: 20px;
                    cursor: pointer;
                    transition: all 0.2s ease-in-out;

                    &:hover {
                        background-color: var(--color-white-subtle);
                        color: var(--color-text-main);
                    }

                    &.active {
                        background-color: var(--color-tabs);
                        color: var(--color-white);
                        border-color: var(--color-tabs);
                    }
                }
            }
        }

        .no-transaction-container {
            display: none;

            #noTransactionFound {
                .highlight {
                    font-weight: var(--font-weight-bold);
                    color: var(--color-tabs);
                    background-color: var(--color-white-subtle);
                    padding: 2px 6px;
                    border-radius: 4px;
                }
            }

            #clearFilters, #noTransactionFound {
                padding: 12px 15px;
            }

            #clearFilters {
                background-color: var(--color-delete);
                color: var(--color-white);
                margin-left: 15px;
                gap: 10px;
                align-items: baseline;

                &:hover {
                    opacity: 0.9;
                }
            }
        }
    }

    .sidebar-section {
        flex: 1;
        background: var(--color-white);
        padding: 20px;
        border-radius: 10px;
        box-shadow: var(--box-shadow-card);
        border-top: 4px solid var(--color-food);

        .food-list li {
            background-color: var(--color-background-food);
            margin-bottom: 8px;
            border: 1px solid var(--color-border);
            border-radius: 6px;
            font-weight: bold;
            color: var(--color-text-main);
            grid-template-columns: 1fr 60px;

            .transaction-amount {
                padding-right: 0;
                color: var(--color-text-main);
            }
        }
    }
}

@media (min-width: 768px) {
    --font-size-x-small: 14px;
    --font-size-small: 16px;
    --font-size-medium: 18px;
    --font-size-heading-h1: 36px;
    --font-size-heading-h2: 24px;
}

@media (max-width: 1040px){
    .transaction-form {
        flex-direction: column;

        > .app-input, .app-select {
            margin-right: 0;
        }

        .app-input {
            margin-bottom: 10px;
        }

        .select-wrapper {
            .app-select {
                margin-bottom: 20px;
            }

            .select-icon {
                top: 15px;
                right: 24px;
            }
        }
    }

    .stats-row {
        flex-wrap: wrap;
        gap: 15px;

        .stat-card {
            flex: 1 1 100%;
        }
    }

    .chart-card {
        .chart-legend {
            flex-wrap: wrap;
            gap: 12px 20px;
        }
    }

    .main-workspace {
        flex-direction: column;

        .ledger-section, .sidebar-section {
            flex: 1 1 100%;
            width: 100%;
        }

        .data-list {
            li {
                display: grid;
                grid-template-columns: 1fr auto 32px;
                grid-template-areas:
                    "desc amount delete"
                    "cat  amount delete";
                row-gap: 4px;
                column-gap: 8px;
                padding: 12px 8px;

                &.li-headers {
                    display: none;
                }

                .transaction-description {
                    grid-area: desc;
                    font-weight: var(--font-weight-bold);
                }

                .transaction-category {
                    grid-area: cat;
                    text-align: left;
                    color: var(--color-text-muted);
                    padding-right: 0;
                    font-size: var(--font-size-x-small);
                }

                .transaction-amount {
                    grid-area: amount;
                    align-self: center;
                    text-align: right;
                    font-weight: var(--font-weight-bold);
                    padding-right: 0;
                }

                .delete-btn {
                    grid-area: delete;
                    align-self: center;
                    justify-self: center;
                    padding: 4px;
                    font-size: var(--font-size-medium);
                }
            }
        }

        .ledger-section {
            .filter-toolbar {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;

                .search-wrapper {
                    max-width: 100%;
                    min-width: 100%;
                }

                .filter-tabs {
                    width: 100%;
                    overflow-x: auto;
                    padding-bottom: 10px;
                    justify-content: start;
                }
            }
        }
    }
}