:root {
    /* Light Mode (Default) */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-color: #0284c7;
    --accent-hover: #0369a1;
    --border-color: #e2e8f0;
    --input-bg: #ffffff;
    --read-only-bg: #f1f5f9;
    --success-bg: #dcfce7;
    --success-text: #166534;
    --error-bg: #fee2e2;
    --error-text: #991b1b;
    --font-family: 'Inter', sans-serif;
}

body.dark-mode {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
    --border-color: #334155;
    --input-bg: #0f172a;
    --read-only-bg: rgba(15, 23, 42, 0.5);
    --success-bg: rgba(16, 185, 129, 0.2);
    --success-text: #34d399;
    --error-bg: rgba(239, 68, 68, 0.2);
    --error-text: #f87171;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 1.5rem 1rem;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    width: 100%;
    max-width: 600px;
}

/* Header & Toggle */
header {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
}

.header-top {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.5rem;
}

h1 {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

/* Subtitle Styling */
.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.6;
}

.subtitle.left {
    text-align: left;
    margin-bottom: 0.5rem;
}

ul.subtitle {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    list-style-type: disc;
}

ul.subtitle li {
    margin-bottom: 0.25rem;
}

.icon-btn {
    background: none;
    border: 1px solid var(--border-color);
    cursor: pointer;
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    height: 40px;
    width: 40px;
    justify-content: center;
    position: absolute;
    right: 0;
    top: 0;
    transition: background-color 0.2s;
    z-index: 10;
}

.icon-btn:hover {
    background-color: var(--border-color);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

body.dark-mode .sun-icon {
    display: block;
}

body.dark-mode .moon-icon {
    display: none;
}

.card {
    background-color: var(--card-bg);
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    transition: background-color 0.3s, border-color 0.3s;
}

h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Saham Section Grid */
.saham-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    /* Inputs wider than image */
    gap: 1.5rem;
}

.saham-image {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.saham-image img {
    width: 100%;
    height: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.image-caption {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    text-align: center;
    font-style: italic;
}

label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    font-weight: 500;
}

input[type="text"],
input[type="number"],
input[type="date"] {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s, background-color 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
}

/* Ratio Inputs */
.ratio-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ratio-inputs input {
    text-align: center;
}

.separator {
    font-weight: bold;
    color: var(--text-secondary);
}

/* Read-only values */
.read-only-value {
    padding: 0.625rem 0.875rem;
    background-color: var(--read-only-bg);
    border-radius: 0.375rem;
    color: var(--text-primary);
    font-weight: 500;
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 0.95rem;
    border: 1px solid transparent;
}

/* Ownership Grid (2 Columns) */
.ownership-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.ownership-col h3 {
    font-size: 0.9rem;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.divider-line {
    height: 1px;
    background-color: var(--border-color);
    margin: 1rem 0;
}

/* Summary Section */
.summary-row {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.25rem 0;
}

.summary-item .label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.summary-item .value {
    font-weight: 600;
    font-size: 1rem;
}

.summary-item.highlight .value {
    color: var(--accent-color);
    font-size: 1.1rem;
}

/* Conclusion Grid */
.conclusion-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.info-item {
    background-color: var(--read-only-bg);
    padding: 0.75rem;
    border-radius: 0.375rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-item .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-item .value {
    font-size: 1rem;
    font-weight: 600;
}

.highlight-box {
    background-color: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

body.dark-mode .highlight-box {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(129, 140, 248, 0.1));
}

.highlight-box .value {
    color: var(--accent-color);
}

/* Recommendation Box */
.recommendation-box {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.recommendation-box.hidden {
    display: none;
}

.recommendation-box.buy {
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-text);
}

.recommendation-box.sell {
    background-color: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-text);
}

/* Button & Disclaimer */
.action-area {
    margin-top: 1.5rem;
    text-align: center;
}

/* Button Internal */
.action-area-internal {
    margin-top: 1.5rem;
}

button {
    width: 100%;
    padding: 0.875rem;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-bottom: 0.75rem;
}

button:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

button:active:not(:disabled) {
    transform: scale(0.98);
}

button:disabled {
    background-color: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.7;
}

/* Footer Area */
.footer-area {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

.disclaimer {
    font-size: 0.75rem;
    font-style: italic;
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.masthead {
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.masthead a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.masthead a:hover {
    text-decoration: underline;
}

.repo-link {
    margin-top: 0.5rem;
    font-size: 0.8rem;
}

.repo-link a {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.repo-link a:hover {
    color: var(--accent-color);
}

.github-icon {
    width: 14px;
    height: 14px;
}

/* Responsive */
@media (max-width: 480px) {

    .form-row,
    .ownership-grid,
    .conclusion-grid {
        grid-template-columns: 1fr;
    }

    .saham-grid {
        display: flex;
        flex-direction: column-reverse;
        gap: 1rem;
    }

    .icon-btn {
        top: -0.5rem;
        /* Adjust for mobile header spacing */
    }

    .header-top {
        justify-content: center;
        margin-bottom: 1rem;
    }

    .saham-image {
        display: flex;
        width: 100%;
        height: auto;
        margin-bottom: 0.5rem;
    }

    /* Prevent zoom on mobile inputs */
    input[type="text"],
    input[type="number"],
    input[type="date"] {
        font-size: 16px;
    }
}