:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #222222);
    --hint-color: var(--tg-theme-hint-color, #707579);
    --link-color: var(--tg-theme-link-color, #248bdf);
    --primary-btn-bg: var(--tg-theme-button-color, #248bdf);
    --primary-btn-text: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #f4f4f5);
    
    /* Minimalist Design Tokens */
    --danger-color: #e53935;
    --success-color: #4caf50;
    --card-bg: var(--tg-theme-bg-color, #ffffff);
    --card-border: rgba(0, 0, 0, 0.08);
    --card-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --radius-lg: 12px;
    --radius-md: 8px;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Dark Mode Overrides if TG provides them */
@media (prefers-color-scheme: dark) {
    :root {
        --card-border: rgba(255, 255, 255, 0.08);
        --card-shadow: 0 1px 4px rgba(0,0,0,0.3);
    }
}

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

body {
    font-family: var(--font-main);
    background-color: var(--secondary-bg);
    color: var(--text-color);
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
}

.app-header {
    margin-bottom: 20px;
    padding: 0 4px;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.app-header h1 {
    font-size: 22px;
    font-weight: 700;
}

.user-info {
    font-size: 13px;
    color: var(--hint-color);
}

.card-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Flat Card Style */
.approval-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--card-shadow);
}

.card-header {
    margin-bottom: 12px;
}

.card-header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
}

.card-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-color);
}

.session-badge {
    background: var(--secondary-bg);
    color: var(--hint-color);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--card-border);
}

.card-subtitle {
    font-size: 13px;
    color: var(--hint-color);
    margin-top: 2px;
}

/* Body Content */
.card-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.block-key-value {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    padding: 4px 0;
}

.block-key-value .key-wrapper {
    color: var(--hint-color);
    display: flex;
    align-items: center;
    gap: 6px;
}

.block-key-value .value {
    font-weight: 500;
}

.block-divider {
    height: 1px;
    background: var(--card-border);
    margin: 8px 0;
}

.block-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.block-expandable {
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    background: var(--secondary-bg);
    margin: 4px 0;
}

.expandable-trigger {
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 13px;
    font-weight: 500;
    text-align: left;
    display: flex;
    justify-content: space-between;
}

.expandable-content {
    max-height: 0;
    overflow: hidden;
    padding: 0 12px;
    font-size: 13px;
    color: var(--hint-color);
    transition: max-height 0.2s ease-out;
}

.block-expandable.open .expandable-content {
    max-height: 300px;
    padding-bottom: 12px;
}

.block-text {
    font-size: 14px;
    color: var(--text-color);
    padding: 4px 0;
}

/* Actions */
.card-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.btn {
    flex: 1;
    padding: 10px;
    border-radius: var(--radius-md);
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.btn-primary {
    background: var(--primary-btn-bg);
    color: var(--primary-btn-text);
}

.btn-danger {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.btn:active {
    opacity: 0.7;
}

/* Rejection */
.rejection-container {
    margin-top: 12px;
    padding: 12px;
    background: var(--secondary-bg);
    border-radius: var(--radius-md);
}

.rejection-input {
    width: 100%;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-color);
    padding: 8px;
    border-radius: 4px;
    font-size: 14px;
    min-height: 60px;
    margin-bottom: 8px;
}

.rejection-actions {
    display: flex;
    gap: 8px;
}

.loader {
    text-align: center;
    padding: 40px;
    color: var(--hint-color);
}