@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* --- 1. Variabel CSS untuk Konsistensi & Kustomisasi Mudah --- */
:root {
    /* Palet Warna */
    --primary-color: #007bff; /* Biru primer, cerah & menarik */
    --primary-dark: #0056b3; /* Biru lebih gelap untuk hover/active */
    --primary-light: #e6f2ff; /* Biru sangat terang, untuk latar belakang edit button */
    --accent-color: #28a745; /* Hijau aksen (misal: success) */
    --accent-dark: #218838;
    --background-light: #f8f9fa; /* Latar belakang terang, bersih */
    --card-background: #ffffff; /* Latar belakang card/konten */
    --text-color: #343a40; /* Teks utama, abu-abu gelap */
    --text-light: #6c757d; /* Teks sekunder/placeholder */
    --white: #ffffff; /* Explicitly define white */
    --border-color: #dee2e6; /* Warna border default */
    --shadow-light: rgba(0, 0, 0, 0.05); /* Bayangan sangat ringan */
    --shadow-medium: rgba(0, 0, 0, 0.1); /* Bayangan sedang */
    --shadow-strong: rgba(0, 0, 0, 0.2); /* Bayangan kuat (misal: hover) */
    --danger-color: #dc3545; /* Merah untuk error/delete */
    --danger-light: rgba(220, 53, 69, 0.1); /* Latar belakang alert danger */
    --warning-color: #ffc107; /* Kuning untuk warning */
    --warning-light: rgba(255, 193, 7, 0.1); /* Latar belakang alert warning */
    --success-light: rgba(40, 167, 69, 0.1); /* Latar belakang alert success */

    /* Spacing & Ukuran */
    --padding-sm: 0.75rem;
    --padding-md: 1.25rem;
    --padding-lg: 2rem;
    --margin-sm: 0.5rem;
    --margin-md: 1rem;
    --margin-lg: 1.5rem;
    --section-gap: 2rem; /* Jarak antar bagian dalam main */

    /* Border Radius */
    --border-radius-sm: 0.375rem; /* 6px */
    --border-radius-md: 0.5rem; /* 8px */
    --border-radius-lg: 0.75rem; /* 12px */

    /* Transisi */
    --transition-speed: 0.3s;
    --transition-ease: ease-in-out;
    --transition-fast: 0.15s;

    /* Padding khusus untuk tombol navigasi */
    --padding-md-btn: 1.1rem 1rem;
}

/* --- 2. Reset & Global Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-light);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color var(--transition-speed) var(--transition-ease);
}

a:hover {
    color: var(--primary-dark);
}

/* --- 3. Header & Navigasi --- */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white) !important; /* Force text color to white for header */
    padding: var(--padding-md) var(--padding-lg);
    text-align: center;
    font-weight: 700;
    font-size: 2.2rem;
    letter-spacing: 0.05em;
    user-select: none;
    box-shadow: 0 0.25rem 0.5rem var(--shadow-medium);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    background-color: var(--primary-dark);
    box-shadow: 0 0.125rem 0.25rem var(--shadow-light);
    flex-wrap: wrap;
    justify-content: center;
}

nav button {
    flex-grow: 1;
    flex-basis: 0;
    border: none;
    padding: var(--padding-md-btn);
    background-color: transparent;
    color: var(--white) !important; /* Force text color to white for nav buttons */
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-speed) var(--transition-ease), 
                transform var(--transition-fast) var(--transition-ease),
                box-shadow var(--transition-speed) var(--transition-ease);
    font-size: 1.05rem;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    will-change: transform, background-color;
    display: flex; /* Always flex */
    align-items: center; /* Vertical align */
    justify-content: center; /* Horizontal align */
    gap: 0.5rem; /* Gap between icon and text */
    text-align: center;
}

nav button i {
    font-size: 1.15rem;
    color: inherit !important; /* Ensure icon color inherits from button (white) */
}

nav button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--white);
    transform: translateX(-100%);
    transition: transform var(--transition-speed) var(--transition-ease);
}

nav button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

nav button.active {
    background-color: var(--primary-color);
    font-weight: 600;
    box-shadow: inset 0 3px 6px var(--shadow-medium);
}

nav button.active::after {
    transform: translateX(0);
}

/* --- 4. Main Content Area --- */
main {
    flex-grow: 1;
    max-width: 1200px;
    margin: var(--margin-lg) auto;
    background-color: var(--card-background);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 0.5rem 1.5rem var(--shadow-medium);
    padding: var(--padding-lg);
    box-sizing: border-box;
    overflow: hidden;
}

section {
    display: none;
    padding: var(--section-gap) 0;
    animation: fadeIn 0.6s var(--transition-ease) forwards;
}

section:first-of-type {
    padding-top: 0;
}
section:last-of-type {
    padding-bottom: 0;
}

section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 5. Headings --- */
h2 {
    margin-top: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: var(--margin-lg);
    text-transform: capitalize;
}

h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--margin-lg);
    margin-bottom: var(--margin-md);
}

p {
    margin-bottom: var(--margin-sm);
    color: var(--text-light);
}

/* --- 6. Form Elements (Labels, Inputs, Selects) --- */
label {
    display: block;
    margin-top: var(--margin-md);
    font-weight: 500;
    color: var(--text-light);
    font-size: 0.95rem;
}

input[type=text],
input[type=number],
input[type=date],
select {
    width: 100%;
    padding: var(--padding-sm);
    margin-top: 0.5rem;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    color: var(--text-color);
    background-color: var(--card-background);
    transition: border-color var(--transition-speed) var(--transition-ease), 
                box-shadow var(--transition-speed) var(--transition-ease);
}

input[type=text]::placeholder,
input[type=number]::placeholder {
    color: var(--text-light);
    opacity: 0.7;
}

input[type=text]:focus,
input[type=number]:focus,
input[type=date]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.15rem rgba(0, 123, 255, 0.25);
}

/* --- 7. Buttons --- */
button.primary {
    margin-top: var(--margin-lg);
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: var(--padding-md) var(--padding-lg);
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: background-color var(--transition-speed) var(--transition-ease), 
                transform var(--transition-fast) var(--transition-ease), 
                box-shadow var(--transition-speed) var(--transition-ease);
    box-shadow: 0 0.25rem 0.75rem rgba(0, 123, 255, 0.2);
    will-change: transform, background-color, box-shadow;
}

button.primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 0.375rem 1rem rgba(0, 123, 255, 0.3);
}

button.primary:active {
    transform: translateY(0);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.2);
}

/* Small button variant for sub-actions */
button.primary.small-button {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    margin-top: var(--margin-md);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 123, 255, 0.1);
}
button.primary.small-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 123, 255, 0.2);
}


/* --- 8. Tables --- */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: var(--margin-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 0.125rem 0.5rem var(--shadow-light);
}

th, td {
    padding: var(--padding-sm) var(--padding-md);
    text-align: left;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #e9ecef;
    color: var(--text-color);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
}

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

tr:hover {
    background-color: #f2f2f2;
}

/* --- 9. Action Buttons (Edit/Delete/View) --- */
button.edit, button.delete, button.view-receipt,
button.edit-transaction, button.delete-transaction {
    background: none;
    border: none;
    font-weight: 500;
    cursor: pointer;
    padding: 0.3rem 0.6rem;
    margin-right: 0.4rem;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed) var(--transition-ease), 
                color var(--transition-speed) var(--transition-ease),
                transform var(--transition-fast) var(--transition-ease);
    font-size: 0.85rem;
    will-change: transform, background-color;
}

button.edit, button.edit-transaction {
    color: var(--primary-color);
}

button.edit:hover, button.edit-transaction:hover {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

button.delete, button.delete-transaction {
    color: var(--danger-color);
}

button.delete:hover, button.delete-transaction:hover {
    background-color: var(--danger-light);
    color: var(--danger-color);
    transform: translateY(-1px);
}

button.view-receipt {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed) var(--transition-ease), transform var(--transition-fast) var(--transition-ease);
}

button.view-receipt:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

/* --- 10. Specific Elements Layouts --- */
.action-buttons-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--margin-md);
    margin-top: var(--margin-lg);
    justify-content: flex-start;
}

.action-buttons-group button.primary {
    margin-top: 0;
    flex-grow: 1;
    min-width: 150px;
}

.filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--margin-md);
    margin-bottom: var(--margin-md);
    align-items: flex-end;
}

.filter-controls label {
    margin-top: 0;
    margin-bottom: 0.3rem;
    flex-basis: auto;
    min-width: 80px;
}

.filter-controls input[type="date"] {
    flex-grow: 1;
    max-width: 250px;
    margin-top: 0;
}

.filter-controls button {
    margin-top: 0;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
}

.separator-line {
    border: 0;
    border-top: 1px dashed var(--border-color);
    margin: var(--section-gap) 0;
}

.pricing-tool-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--margin-lg);
    margin-top: var(--margin-md);
}

.pricing-tool {
    flex: 1;
    min-width: 300px;
    background-color: var(--background-light);
    padding: var(--padding-md);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    box-shadow: 0 0.125rem 0.25rem var(--shadow-light);
}

.pricing-tool .primary.small-button {
    display: block;
    width: 100%;
}

.pricing-tool p {
    margin-top: var(--margin-md);
    font-size: 1rem;
}

.pricing-tool p strong {
    color: var(--primary-dark);
}

.receipt {
    white-space: pre-wrap;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    background-color: var(--card-background);
    padding: var(--padding-md) var(--padding-lg);
    border-radius: var(--border-radius-md);
    box-shadow: 0 0.25rem 0.75rem var(--shadow-light);
    font-size: 0.9rem;
    line-height: 1.4;
    text-align: center;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

.receipt .store-logo {
    max-width: 100px;
    height: auto;
    margin-bottom: 1rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.receipt pre {
    font-family: inherit;
    font-size: inherit;
    white-space: pre-wrap;
    margin: 0;
    padding: 0;
    text-align: left;
}

.receipt hr {
    border: 0;
    border-top: 1px dashed #aaa;
    margin: 0.75rem 0;
}

canvas {
    max-width: 100%;
    height: 380px;
    margin-top: var(--margin-lg);
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    box-shadow: 0 0.25rem 0.75rem var(--shadow-light);
    padding: var(--padding-md);
    box-sizing: border-box;
    transition: box-shadow var(--transition-speed) var(--transition-ease);
}
canvas:hover {
    box-shadow: 0 0.5rem 1.5rem var(--shadow-medium);
}


/* --- Alert Styles --- */
.alert {
    padding: var(--padding-sm);
    border-radius: var(--border-radius-sm);
    margin-top: var(--margin-md);
    font-weight: 600;
    text-align: center;
    box-shadow: 0 0.125rem 0.25rem var(--shadow-light);
    transition: all var(--transition-speed) var(--transition-ease);
}

/* Default Danger Alert */
.alert.alert-danger {
    background-color: var(--danger-light);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    animation: pulseRed 1.5s infinite alternate;
}

/* Success Alert */
.alert.alert-success {
    background-color: var(--success-light);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    animation: pulseGreen 1.5s infinite alternate;
}

/* Warning Alert */
.alert.alert-warning {
    background-color: var(--warning-light);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
    animation: pulseYellow 1.5s infinite alternate;
}

/* --- Keyframes for Alert Animations --- */
@keyframes pulseRed {
    0% { background-color: var(--danger-light); }
    100% { background-color: rgba(220, 53, 69, 0.2); }
}

@keyframes pulseGreen {
    0% { background-color: var(--success-light); }
    100% { background-color: rgba(40, 167, 69, 0.2); }
}

@keyframes pulseYellow {
    0% { background-color: var(--warning-light); }
    100% { background-color: rgba(255, 193, 7, 0.2); }
}

/* --- Modal Styles --- */
.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInModal 0.3s ease-out;
}

.modal-content {
    background-color: var(--card-background);
    margin: auto;
    padding: var(--padding-lg);
    border: 1px solid var(--border-color);
    width: 80%;
    max-width: 500px;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 0.5rem 1.5rem var(--shadow-strong);
    position: relative;
    animation: slideInModal 0.4s ease-out;
}

.close-button {
    color: var(--text-light);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    position: absolute;
    top: var(--padding-sm);
    right: var(--padding-md);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-button:hover,
.close-button:focus {
    color: var(--text-color);
}

.modal-content h3 {
    margin-top: 0;
    margin-bottom: var(--margin-lg);
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* Override primary button margin for modal buttons */
.modal-content form .primary {
    width: auto;
    display: inline-block;
    margin-top: var(--margin-md); /* Adjust margin from label */
    margin-right: var(--margin-sm);
}

.modal-content form .danger-button {
    background-color: var(--danger-color);
    box-shadow: 0 0.25rem 0.75rem rgba(220, 53, 69, 0.2);
}
.modal-content form .danger-button:hover {
    background-color: #c82333;
    box-shadow: 0 0.375rem 1rem rgba(220, 53, 69, 0.3);
}

/* Modal Animations */
@keyframes fadeInModal {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInModal {
    from { transform: translateY(-50px) scale(0.9); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}


/* --- 11. Responsiveness (Media Queries) --- */

/* Medium Devices (Tablets, Laptops kecil) */
@media (max-width: 992px) {
    body {
        font-size: 15px;
    }
    header {
        font-size: 1.8rem;
        padding: var(--padding-md);
    }
    nav button {
        padding: var(--padding-sm) var(--padding-md);
        font-size: 0.9rem;
    }
    nav button i {
        font-size: 1rem;
    }
    main {
        margin: var(--margin-md) auto;
        padding: var(--padding-md);
        border-radius: var(--border-radius-md);
    }
    h2 {
        font-size: 1.8rem;
    }
    h3 {
        font-size: 1.3rem;
    }
    canvas {
        height: 300px;
    }
    .action-buttons-group {
        flex-direction: column;
        gap: var(--margin-sm);
    }
    .action-buttons-group button.primary {
        width: 100%;
        min-width: unset;
    }
    .pricing-tool-group {
        flex-direction: column;
    }
    .pricing-tool {
        min-width: unset;
        width: 100%;
    }
}

/* Small Devices (Phones) - Target for the screenshot issue */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    header {
        font-size: 1.5rem;
        padding: var(--padding-sm);
    }
    nav {
        /* Keep flex-direction: row; (default) for nav container to allow horizontal */
        flex-direction: row; 
        justify-content: space-around; /* Distribute buttons evenly */
    }
    nav button {
        padding: 0.5rem; /* Reduced padding for very small screens */
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 0.8rem; /* Further reduced font size */
        flex-direction: row; /* KEEP ICONS AND TEXT HORIZONTAL */
        gap: 0.2rem; /* Reduced gap */
        white-space: nowrap; /* Keep text on one line */
        text-align: center;
        flex-basis: auto; /* Allow them to shrink as needed */
        min-width: 0; /* Allow to shrink smaller */
        /* Flexbox will shrink buttons if they don't fit, potentially making them very narrow. */
    }
    nav button i {
        font-size: 0.9rem; /* Slightly larger icon */
        margin-bottom: 0; /* Remove vertical margin */
    }
    nav button:last-child {
        border-bottom: none;
    }
    main {
        margin: var(--margin-sm);
        padding: var(--padding-sm);
        border-radius: var(--border-radius-sm);
    }
    h2 {
        font-size: 1.5rem;
        padding-bottom: 0.5rem;
        margin-bottom: var(--margin-md);
    }
    h3 {
        font-size: 1.2rem;
    }

    /* Tabel Responsif (Card-like layout) */
    table, thead, tbody, th, td, tr {
        display: block;
        width: 100%;
    }
    thead {
        display: none;
    }
    tr {
        margin-bottom: var(--margin-md);
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-md);
        overflow: hidden;
        box-shadow: 0 0.125rem 0.5rem var(--shadow-light);
        padding: var(--padding-sm) 0;
    }
    td {
        border: none;
        position: relative;
        padding-left: 50%;
        text-align: right;
        padding-right: var(--padding-sm);
        font-size: 0.9rem;
    }
    td::before {
        content: attr(data-label);
        position: absolute;
        left: var(--padding-sm);
        width: calc(50% - var(--padding-md));
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-weight: 600;
        color: var(--text-light);
        text-align: left;
    }
    td[data-label="Actions"], td:last-child:not([data-label="Actions"]) {
        text-align: center;
        padding-left: var(--padding-sm);
    }
    td[data-label="Actions"]::before {
        display: none;
    }

    /* Filter Controls Responsif */
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
        gap: var(--margin-sm);
    }
    .filter-controls label {
        width: 100%;
        margin-bottom: 0.3rem;
    }
    .filter-controls input[type="date"],
    .filter-controls button {
        max-width: 100%;
        width: 100%;
        margin-top: 0;
    }

    /* Input dan Tombol Umum */
    input[type=text], input[type=number], input[type=date], select {
        font-size: 0.9rem;
        padding: 0.6rem;
    }
    button.primary {
        width: 100%;
        padding: 0.7rem 1.5rem;
        font-size: 0.95rem;
        margin-top: var(--margin-md);
    }
    .receipt {
        padding: var(--padding-sm) var(--padding-md);
        font-size: 0.8rem;
    }
    .receipt .store-logo {
        max-width: 80px;
        margin-bottom: 0.75rem;
    }
    canvas {
        height: 250px;
        padding: var(--padding-sm);
    }

    /* Modal on mobile */
    .modal-content {
        width: 95%;
        padding: var(--padding-md);
    }
    .modal-content form .primary,
    .modal-content form .danger-button {
        width: 100%;
        margin-right: 0;
        margin-bottom: var(--margin-sm);
    }
}

/* Extra Small Devices */
@media (max-width: 480px) {
    body {
        font-size: 13px;
    }
    header {
        font-size: 1.3rem;
        padding: 0.75rem;
    }
    nav button {
        font-size: 0.7rem;
        padding: 0.3rem;
        gap: 0.1rem;
    }
    nav button i {
        font-size: 0.8rem;
    }
    main {
        margin: 0.5rem;
        padding: 0.75rem;
    }
    h2 {
        font-size: 1.3rem;
    }
    h3 {
        font-size: 1rem;
    }
    td::before {
        font-size: 0.75rem;
        left: 0.5rem;
        width: calc(50% - 1rem);
    }
    td {
        padding-left: 55%;
    }
    .modal-content h3 {
        font-size: 1.3rem;
    }
}

/* Tambahkan di bagian paling bawah file style.css Anda */

footer {
    background-color: var(--primary-dark);
    color: var(--white);
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    margin-top: 2rem; /* Memberi jarak dari konten utama */
    box-shadow: 0 -2px 5px var(--shadow-light); /* Bayangan ke atas */
}

footer p {
    margin: 0; /* Menghilangkan margin default dari paragraf */
    color: var(--white); /* Memastikan teks footer tetap putih */
}

/* Penyesuaian responsif untuk footer jika diperlukan */
@media (max-width: 768px) {
    footer {
        padding: 0.8rem;
        font-size: 0.8rem;
    }
}