/* Global Styles & Variables */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-light: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.5;
}

/* Common Layout Components */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 0.875rem;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.input-field {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    transition: border-color 0.2s;
    margin-bottom: 1rem;
}

.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

h1, h2, h3 {
    color: var(--text-main);
    margin-bottom: 1rem;
}

/* Call Modal Overlay Styles (Global) */
#call-overlay {
    display: none; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: rgba(15, 23, 42, 0.9); 
    backdrop-filter: blur(8px); 
    align-items: center; 
    justify-content: center; 
    z-index: 2000;
}

.call-box {
    background: white; 
    border-radius: 24px; 
    padding: 3rem;
    width: 340px; 
    text-align: center; 
    box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

.call-box h2 { 
    font-size: 1.5rem; 
    margin-bottom: 0.5rem; 
}

#call-status { 
    font-size: 0.875rem; 
    color: var(--text-muted); 
    margin-bottom: 2rem; 
}

.controls { 
    display: flex; 
    gap: 1rem; 
    justify-content: center; 
}

.btn-call-action {
    flex: 1; 
    padding: 0.75rem; 
    border-radius: 12px; 
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}