:root {
    --background-color: #f4f7f6;
    --text-color: #333;
    --card-background: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --primary-color: #0056b3;
    --secondary-color: #6c757d;
    --hover-color: #004085;
    --modal-bg: rgba(0, 0, 0, 0.5);
    --input-bg: #fdfdfd;
    --placeholder-color: #777;
    --error-bg-color: #dc3545;
    --error-text-color: white;
    --warning-bg-color: #ffc107;
    --warning-text-color: #333;
}

[data-theme="dark"] {
    --background-color: #2c2c2c;
    --text-color: #e0e0e0;
    --card-background: #3a3a3a;
    --border-color: #555;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --primary-color: #4dc2ff;
    --secondary-color: #909ea8;
    --hover-color: #008fcc;
    --modal-bg: rgba(0, 0, 0, 0.7);
    --input-bg: #4a4a4a;
    --placeholder-color: #888;
    --error-bg-color: #c00;
    --error-text-color: white;
    --warning-bg-color: #ffc107;
    --warning-text-color: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: 0 6px 20px var(--shadow-color);
    padding: 30px;
    width: 100%;
    max-width: 600px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-size: 2.2em;
    letter-spacing: 0.5px;
}

#currency-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.currency-row {
    display: flex;
    align-items: center;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    gap: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease, border-color 0.3s ease;
    position: relative;
}

.currency-row:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.currency-row.base-currency-row {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-color), 0 2px 8px var(--shadow-color);
    position: relative;
    z-index: 1;
}

.currency-row.base-currency-row::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 2px dashed var(--primary-color);
    border-radius: 10px;
    opacity: 0.5;
    z-index: -1;
}

.currency-row span {
    font-weight: bold;
    font-size: 1.1em;
}

.currency-info {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 90px;
}

.flag-emoji {
    font-size: 1.5em;
    line-height: 1;
}

.currency-code {
    flex-grow: 1;
    text-align: left;
}

.input-group {
    display: flex;
    align-items: center;
    flex-grow: 1;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--input-bg);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
    overflow: hidden;
    position: relative;
}

.input-group:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.input-symbol {
    padding: 10px 5px 10px 12px;
    color: var(--text-color);
    font-size: 1.1em;
    font-weight: bold;
    white-space: nowrap;
    flex-shrink: 0;
}

.currency-row input[type="text"] {
    flex-grow: 1;
    padding: 10px 12px;
    border: none;
    border-radius: 0 6px 6px 0;
    font-size: 1.1em;
    color: var(--text-color);
    background-color: transparent;
    outline: none;
    transition: color 0.3s ease;
    text-align: right;
    -moz-appearance: textfield;
    width: 100%;
    min-width: 0;
}

.currency-row input[type="number"]::-webkit-outer-spin-button,
.currency-row input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.currency-row input[type="text"]::placeholder {
    color: var(--placeholder-color);
}

/* Button base styles */
button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    white-space: nowrap;
}

button:hover {
    background-color: var(--hover-color);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

/* Specific button styles */
.remove-currency-btn {
    background-color: #dc3545;
    padding: 8px 12px;
    font-size: 1em;
}

.remove-currency-btn:hover {
    background-color: #c82333;
}

#add-currency-btn {
    background-color: var(--primary-color) !important;
    color: white !important;
    padding: 8px 12px !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    font-size: 1.2em !important;
    position: fixed !important;
    top: 20px !important;
    left: 20px !important;
    z-index: 100 !important;
    box-shadow: 0 4px 10px var(--shadow-color) !important;
    transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.3s ease !important;
    border: none !important;
    white-space: nowrap !important;
}

#add-currency-btn:hover {
    background-color: var(--hover-color) !important;
    transform: translateY(-1px) !important;
}

#add-currency-btn:active {
    transform: translateY(0) !important;
}

.confirm-add-currency {
    width: 100% !important;
    padding: 12px 20px !important;
    font-size: 1em !important;
    margin-top: 10px !important;
    background-color: var(--primary-color) !important;
}

.confirm-add-currency:hover {
    background-color: var(--hover-color) !important;
}

.close-button {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none !important;
    color: var(--secondary-color) !important;
    font-size: 1.8em;
    padding: 5px 10px;
    border-radius: 5px;
}

.close-button:hover {
    color: var(--text-color) !important;
    background-color: var(--border-color) !important;
}

#theme-toggle {
    background-color: var(--secondary-color) !important;
    color: white !important;
    padding: 8px 12px !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    font-size: 1.2em !important;
    position: fixed !important;
    top: 20px !important;
    right: 20px !important;
    z-index: 100 !important;
    box-shadow: 0 4px 10px var(--shadow-color) !important;
}

#theme-toggle:hover {
    background-color: var(--hover-color) !important;
}

.drag-handle {
    cursor: grab;
    font-size: 1.5em;
    padding: 5px 8px;
    color: var(--secondary-color);
    background-color: var(--background-color);
    border-radius: 4px;
    transition: background-color 0.2s ease, color 0.2s ease;
    margin-left: auto;
}

.drag-handle:hover {
    background-color: var(--border-color);
    color: var(--text-color);
}

.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--card-background);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 6px 20px var(--shadow-color);
    width: 100%;
    max-width: 450px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    transform: translateY(-20px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
    opacity: 1;
}

.modal-content h2 {
    margin-top: 0;
    color: var(--primary-color);
    text-align: center;
}

.currency-search-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.currency-search-container input[type="text"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1.1em;
    background-color: var(--input-bg);
    color: var(--text-color);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease, color 0.3s ease;
    box-sizing: border-box;
}

.currency-search-container input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.suggestion-list {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
    margin-top: 5px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.suggestion-item {
    padding: 15px 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.suggestion-item:hover {
    background-color: var(--background-color);
}

.warning-message, .error-message {
    padding: 10px 15px;
    border-radius: 8px;
    text-align: center;
    font-size: 0.95em;
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.warning-message {
    background-color: var(--warning-bg-color);
    color: var(--warning-text-color);
}

.error-message {
    background-color: var(--error-bg-color);
    color: var(--error-text-color);
}

/* Responsive adjustments */
@media (max-width: 600px) {
    body {
        padding: 15px !important;
    }

    .container {
        padding: 15px;
        margin-top: 10px;
    }

    h1 {
        font-size: 1.8em;
    }

    .currency-row {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px;
    }

    .currency-info {
        min-width: 70px;
        flex-shrink: 0;
    }

    .currency-row .input-group {
        flex: 1 1 200px;
        min-width: 150px;
    }
    
    .currency-row .input-group .input-symbol {
        padding: 8px 4px 8px 8px;
        font-size: 1em;
    }

    .currency-row input[type="text"] {
        text-align: right;
        padding: 8px 10px;
        font-size: 1em;
    }

    .remove-currency-btn {
        width: auto;
        margin-top: 0;
        padding: 6px 10px;
        font-size: 0.9em;
    }

    .drag-handle {
        font-size: 1.2em;
        padding: 4px 6px;
    }

    .modal-content {
        padding: 20px;
        margin: 10px;
    }

    .currency-search-container input[type="text"] {
        width: 100%;
    }

    .confirm-add-currency {
        padding: 15px 25px !important;
        font-size: 1.1em !important;
    }
}