:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --border-color: #334155;
    --success-color: #10b981;
    --primary-color: #3b82f6;
}

html {
    overflow-y: scroll;
    /* Always show scrollbar to prevent layout shift */
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.welcome-strip {
    background-color: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--accent-color);
    padding: 0.5rem 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    font-size: 12pt;
    color: var(--text-primary);
}

.welcome-strip strong {
    color: var(--accent-color);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: -0.025em;
}

.status-indicator {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--success-color);
    font-weight: 500;
    background: rgba(16, 185, 129, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
}

.btn-reset {
    background-color: #ef4444;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.875rem;
    transition: background-color 0.2s;
    margin-right: 1rem;
}

.btn-reset:hover {
    background-color: #dc2626;
}

.dot {
    width: 8px;
    height: 8px;
    background-color: var(--success-color);
    border-radius: 50%;
    margin-right: 0.5rem;
    box-shadow: 0 0 8px var(--success-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}

main {
    flex: 1;
}

/* SMS List Styles */
.sms-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 4rem 0;
    font-style: italic;
}

.sms-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    animation: slideIn 0.3s ease-out;
}

.sms-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border-color: var(--accent-color);
}

.sms-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
}

.sender-phone {
    font-weight: 600;
    color: var(--text-primary);
}

.timestamp {
    color: var(--text-secondary);
}

.sms-body {
    font-size: 1rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

footer {
    margin-top: 3rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}