/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #0a0a0a;
    --card: #1a1610;
    --card-border: #2a2218;
    --text: #ffffff;
    --text-secondary: #d0b898;
    --accent: #e08a3a;
    --accent-hover: #f09a4a;
    --green: #3fb950;
    --red: #f85149;
    --input-bg: #0a0a0a;
    --radius: 12px;
    --radius-sm: 8px;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ===== Container ===== */
.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: 40px;
}

/* ===== Header ===== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0 20px;
}

.back-home {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--card);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1rem;
    transition: border-color 0.2s, color 0.2s;
}

.back-home:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
    transition: background 0.3s;
}

.status-dot.online {
    background: var(--green);
    box-shadow: 0 0 6px rgba(63, 185, 80, 0.5);
}

.status-dot.error {
    background: var(--red);
    box-shadow: 0 0 6px rgba(248, 81, 73, 0.5);
}

/* ===== Market Info ===== */
.market-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.market-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: border-color 0.2s;
}

.market-card:hover {
    border-color: var(--accent);
}

.market-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.market-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.market-change {
    font-size: 0.75rem;
    font-weight: 600;
}

.market-change.up {
    color: var(--green);
}

.market-change.down {
    color: var(--red);
}

.market-change-neutral {
    color: var(--text-secondary);
}

/* ===== Section Title ===== */
.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
}

/* ===== Converter Card ===== */
.converter-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px 20px;
    margin-bottom: 20px;
}

.converter-fields {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.input-icon {
    color: var(--accent);
    font-weight: 700;
    font-size: 0.85rem;
    min-width: 20px;
    text-align: center;
}

.input-group input {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    font-family: 'Inter', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
}

.input-group input::placeholder {
    color: var(--card-border);
}

.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.15);
}

.input-group input.flash-green {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.1);
}

.input-group input.flash-red {
    border-color: var(--red);
    box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.1);
}

.input-hint {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.last-update {
    margin-top: 16px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: right;
}

/* ===== Purchasing Power ===== */
.purchasing-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px 20px;
    margin-bottom: 20px;
}

.purchasing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.purchasing-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 16px;
}

.purchasing-item {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--card-border);
    animation: fadeIn 0.2s ease;
}

.purchasing-item:last-child {
    border-bottom: none;
}

.item-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-brl {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: right;
    white-space: nowrap;
}

.item-sats {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent);
    text-align: right;
    white-space: nowrap;
    min-width: 80px;
}

.item-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 6px;
    border-radius: 4px;
    line-height: 1;
    transition: color 0.15s, background 0.15s;
}

.item-remove:hover {
    color: var(--red);
    background: rgba(248, 81, 73, 0.1);
}

/* Add Item Form */
.add-item-form {
    display: flex;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--card-border);
}

.add-item-form input {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}

.add-item-form input:focus {
    border-color: var(--accent);
}

.add-item-form input:first-child {
    flex: 1;
    min-width: 0;
}

.add-item-form input:nth-child(2) {
    width: 110px;
}

.btn-add {
    background: var(--accent);
    border: none;
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    width: 44px;
    min-width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, transform 0.1s;
}

.btn-add:hover {
    background: var(--accent-hover);
}

.btn-add:active {
    transform: scale(0.95);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 16px 0;
    font-size: 0.7rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s;
}

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

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading .market-value {
    animation: pulse 1.5s ease-in-out infinite;
    color: var(--text-secondary);
}

/* ===== Light Mode ===== */
@media (prefers-color-scheme: light) {
    :root {
        --bg: #f6f9fb;
        --card: #ffffff;
        --card-border: #e8e0d8;
        --text: #1a2b3c;
        --text-secondary: #7a8a98;
        --accent: #e08a3a;
        --accent-hover: #d07a2a;
        --green: #2ea043;
        --red: #cf222e;
        --input-bg: #f0ece8;
    }
}

html[data-theme="light"] {
    --bg: #f6f9fb;
    --card: #ffffff;
    --card-border: #e8e0d8;
    --text: #1a2b3c;
    --text-secondary: #7a8a98;
    --accent: #e08a3a;
    --accent-hover: #d07a2a;
    --green: #2ea043;
    --red: #cf222e;
    --input-bg: #f0ece8;
}

html[data-theme="dark"] {
    --bg: #0a0a0a;
    --card: #1a1610;
    --card-border: #2a2218;
    --text: #ffffff;
    --text-secondary: #d0b898;
    --accent: #e08a3a;
    --accent-hover: #f09a4a;
    --green: #3fb950;
    --red: #f85149;
    --input-bg: #0a0a0a;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    .header {
        padding: 8px 0 16px;
    }

    .logo h1 {
        font-size: 1.1rem;
    }

    .market-info {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .market-card {
        padding: 10px 8px;
    }

    .market-value {
        font-size: 0.85rem;
    }

    .market-label {
        font-size: 0.65rem;
    }

    .converter-card,
    .purchasing-card {
        padding: 20px 16px;
    }

    .input-group input {
        font-size: 1.1rem;
        padding: 12px 14px;
    }

    .purchasing-item {
        grid-template-columns: 1fr auto auto auto;
        gap: 8px;
    }

    .item-sats {
        min-width: 60px;
        font-size: 0.8rem;
    }

    .item-brl {
        font-size: 0.75rem;
    }

    .add-item-form input:nth-child(2) {
        width: 90px;
    }
}

@media (max-width: 360px) {
    .market-info {
        grid-template-columns: 1fr 1fr;
    }

    .market-card:last-child {
        grid-column: span 2;
    }
}