:root {
    /* Dark Green & Tactical Theme */
    --bg-main: #0a0c0b;
    --bg-panel: #111412;
    --bg-panel-light: #1a1e1b;

    --primary-green: #10b981; /* Emerald 500 */
    --primary-green-dim: rgba(16, 185, 129, 0.15);
    --primary-green-glow: rgba(16, 185, 129, 0.4);

    --accent-orange: #f59e0b;
    --text-white: #ecfdf5;
    --text-gray: #9ca3af;
    --border-dark: #252b28;

    --font-heading: "Chakra Petch", sans-serif; /* Tactical/Sci-fi tech look */
    --font-body: "Inter", sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-white);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
}

.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
            circle at 50% 0%,
            rgba(16, 185, 129, 0.08) 0%,
            transparent 50%
        ),
        linear-gradient(to bottom, transparent, #0a0c0b);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-dark);
    margin-bottom: 3rem;
    background: rgba(10, 12, 11, 0.8);
    backdrop-filter: blur(10px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.brand-logo {
    height: 60px;
    width: auto;
    filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.3));
}

.brand-text h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.2;
}

.badge {
    background: var(--primary-green-dim);
    color: var(--primary-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
    display: inline-block;
    padding: 0.2rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 0.3rem;
}

/* CALCULATOR HERO SECTION */
.calculator-hero {
    margin-bottom: 4rem;
    display: flex;
    justify-content: center;
}

.calculator-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-dark);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 900px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(16, 185, 129, 0.1);
    position: relative;
    overflow: hidden;
}

/* Green ambient glow */
.calculator-panel::before {
    content: "";
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 100px;
    background: var(--primary-green);
    filter: blur(80px);
    opacity: 0.15;
    pointer-events: none;
}

.manual-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.manual-header h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    color: #fff;
    margin-bottom: 0.5rem;
}

.manual-header p {
    color: var(--text-gray);
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 800px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }
}

/* Inputs */
.input-group {
    margin-bottom: 2rem;
}

.input-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.range-label {
    display: flex;
    justify-content: space-between;
}

.highlight-val {
    color: var(--primary-green);
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.input-wrapper {
    position: relative;
}

.currency-symbol {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-gray);
    font-family: var(--font-heading);
}

input[type="number"] {
    width: 100%;
    background: var(--bg-panel-light);
    border: 1px solid var(--border-dark);
    color: #fff;
    padding: 1rem 1rem 1rem 2.5rem;
    border-radius: 8px;
    font-size: 1.2rem;
    font-family: var(--font-heading);
    transition: all 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 15px var(--primary-green-dim);
}

.custom-range {
    width: 100%;
    height: 6px;
    background: var(--bg-panel-light);
    border-radius: 3px;
    appearance: none;
    outline: none;
}

.custom-range::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-green);
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary-green-glow);
    transition: transform 0.1s;
}

.custom-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.range-limits {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #4b5563;
    margin-top: 0.5rem;
}

.btn-calculate {
    width: 100%;
    background: var(--primary-green);
    color: #000;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.btn-calculate:hover {
    background: #34d399;
    transform: translateY(-2px);
    box-shadow: 0 8px 12px rgba(16, 185, 129, 0.3);
}

/* Results */
.results-section {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-dark);
    transition: filter 0.3s;
}

.results-section.blurred {
    filter: opacity(0.5) blur(1px);
    pointer-events: none;
}

.result-card.primary {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-dark);
}

.res-label {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.res-value {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.result-details {
    margin-bottom: 2rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.detail-row.sub {
    padding-left: 1rem;
    font-size: 0.85rem;
    color: var(--text-gray);
}

.text-green {
    color: var(--primary-green);
}
.text-orange {
    color: var(--accent-orange);
}

.monthly-box {
    background: var(--primary-green-dim);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
}

.month-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    color: #fff;
}

.month-value {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-green);
}

.month-sub {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 0.25rem;
}

/* CONTENT GRID (A4 Doc + Info) */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 5rem;
    align-items: start;
}

@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Document A4 Styles */
.document-column {
    background: var(--bg-panel);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-dark);
}

.section-badge {
    background: #27272a;
    color: #fff;
    display: inline-block;
    padding: 0.3rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.a4-container {
    width: 100%;
    aspect-ratio: 595/725; /* A4 Ratio */
    background: #fff;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    margin-bottom: 1.5rem;
}

.a4-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.doc-actions {
    text-align: center;
}

.btn-outline {
    display: inline-block;
    border: 1px solid var(--text-gray);
    color: var(--text-gray);
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.btn-outline:hover {
    border-color: #fff;
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

/* Info Text Styling */
.info-block {
    margin-bottom: 3rem;
}

.info-block h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--primary-green);
    margin-bottom: 1rem;
    border-left: 3px solid var(--primary-green);
    padding-left: 1rem;
}

.check-list,
.warning-list {
    list-style: none;
}

.check-list li,
.warning-list li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    position: relative;
    color: #d1d5db;
}

.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-green);
}

.warning-list li::before {
    content: "!";
    position: absolute;
    left: 2px;
    font-weight: bold;
    color: var(--accent-orange);
}

.finance-mini-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.mini-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.mini-card .lbl {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-gray);
}

.mini-card .val {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-top: 0.25rem;
}

.small-note {
    font-size: 0.8rem;
    color: var(--text-gray);
    font-style: italic;
}

.signature-block {
    margin-top: 4rem;
    display: flex;
    flex-direction: column;
    align-items: center; /* Center align for better look with image */
    width: fit-content;
}

.sig-image {
    width: 200px;
    height: auto;
    filter: brightness(0) invert(1); /* Make it white if it's black text, remove this if it's already white/transparent */
    opacity: 0.9;
    transform: rotate(-2deg);
}

.sig-line {
    width: 240px;
    height: 1px;
    background: var(--text-gray);
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.sig-name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--text-white);
}

.sig-role {
    font-size: 0.85rem;
    color: var(--text-gray);
}

/* Animation */
.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
    opacity: 0;
}
.delay-2 {
    animation-delay: 0.2s;
}
.delay-3 {
    animation-delay: 0.3s;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(20px);
    }
}