:root {
    --bg-dark: #0a0e14;
    --card-bg: rgba(20, 26, 36, 0.7);
    --accent-gold: #ffb300;
    --accent-gold-hover: #ffca28;
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --success: #10b981;
    --danger: #ef4444;
    --nav-bg: rgba(30, 41, 59, 0.5);
    --font-main: 'Inter', sans-serif;
    --font-accent: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    padding: 2rem;
}

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
}

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

/* Global Config */
.global-config {
    padding: 1.5rem;
    margin-bottom: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.config-header {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.config-item label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.config-item input {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    padding: 0.6rem 0.8rem;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.username {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.logout-btn {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 0.4rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: 0.3s;
}

.logo-area {
    text-align: center;
}

.logo {
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Nav */
.main-nav {
    display: flex;
    gap: 0.5rem;
    background: var(--nav-bg);
    padding: 0.5rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.nav-item {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
}

.nav-item:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    background: var(--accent-gold);
    color: #000;
}

/* Tabs */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Balance Card */
.balance-card {
    padding: 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 179, 0, 0.3);
}

.balance-info .label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.value-usd {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-gold);
    margin: 0.5rem 0;
}

.value-zmw {
    font-size: 1.25rem;
    color: #fff;
    opacity: 0.8;
}

.exchange-info {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.initial-sum {
    text-align: right;
}

.initial-sum label {
    display: block;
    font-size: 0.85rem;
    color: var(--accent-gold);
    margin-bottom: 0.5rem;
}

.initial-sum input {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--text-secondary);
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
    width: 150px;
    text-align: right;
    outline: none;
}

/* Form */
.add-entry-form {
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.form-header {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-header .plus {
    color: var(--text-secondary);
}

.form-row {
    display: flex;
    gap: 1rem;
}

input, select {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: #fff;
    outline: none;
}

input.flex-grow {
    flex-grow: 1;
}

.btn-add {
    background: var(--success);
    color: #000;
    border: none;
    padding: 0 2rem;
    border-radius: 0.5rem;
    font-weight: 700;
    cursor: pointer;
}

/* Table */
.table-wrapper {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--glass-border);
}

td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.col-amount {
    font-weight: 600;
}

.zmw-val { color: var(--danger); }
.usd-val { color: var(--danger); opacity: 0.8; font-size: 0.85rem; }

/* Mini Dashboard */
.mini-market-dashboard {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem 3rem;
    margin-bottom: 2.5rem;
    border: 1px solid rgba(255, 179, 0, 0.2);
    background: linear-gradient(135deg, rgba(20, 26, 36, 0.8) 0%, rgba(10, 14, 20, 0.9) 100%);
    gap: 4rem;
}

.market-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.stat-label {
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--text-secondary);
    letter-spacing: 0.2em;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-family: var(--font-accent);
    font-size: 1.75rem;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.stat-value .unit {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

.pulse-indicator {
    position: absolute;
    top: -5px;
    right: -20px;
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--success);
    animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(3); opacity: 0; }
}

/* Parameters Panel */
.calculator-params {
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.params-header {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.params-grid {
    display: flex;
    gap: 1.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.param-item {
    flex: 1;
    min-width: 140px;
}

.param-item label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.param-item input {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    padding: 0.5rem;
}

.btn-reset {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    padding: 0.6rem 1.25rem;
    border-radius: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.btn-reset:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* Calculation Breakdown */
.calc-breakdown {
    margin-top: 2rem;
    padding: 1.25rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 0.5rem;
    font-family: 'Inter', monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.breakdown-step {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    padding-bottom: 0.5rem;
}

.breakdown-step:last-child {
    border-bottom: none;
    padding-bottom: 0;
    color: var(--accent-gold);
    font-weight: 700;
}

.step-formula {
    opacity: 0.6;
    font-size: 0.7rem;
}

.step-result {
    font-weight: 600;
    color: #fff;
}

/* Calculators */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Mobile Adaptation */
@media (max-width: 992px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .main-header {
        flex-direction: column;
        gap: 1.5rem;
    }

    .main-nav {
        flex-wrap: wrap;
        padding: 0.25rem;
    }

    .nav-item {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
        flex: 1 1 calc(33.33% - 1rem);
        text-align: center;
    }

    .balance-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
        padding: 1.5rem;
    }

    .value-usd {
        font-size: 2.25rem;
    }

    .mini-market-dashboard {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem;
    }

    .stat-divider {
        width: 100%;
        height: 1px;
    }

    .form-row {
        flex-direction: column;
    }

    .btn-add {
        padding: 1rem;
    }

    .params-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .btn-reset {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .nav-item {
        flex: 1 1 calc(50% - 0.5rem);
    }
    
    .params-grid {
        grid-template-columns: 1fr;
    }
    
    .btn-reset {
        grid-column: span 1;
    }
}

.calculator-card {
    padding: 2rem;
}

.calculator-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    color: var(--accent-gold);
}

.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.input-group input {
    width: 100%;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.info-row label {
    color: var(--text-secondary);
}

.dual-value {
    text-align: right;
    display: flex;
    flex-direction: column;
}

.result-row {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.result-values {
    text-align: right;
}

#calc1-total-usd, #calc2-total-usd {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-gold);
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}

.lang-btn.active {
    background: var(--accent-gold);
    color: #000;
    border-radius: 4px;
}