:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #10b981;
    --danger: #ef4444;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background: radial-gradient(circle at top right, #1e1b4b, #0f172a);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.status-bar {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--glass-border);
    padding: 4px 12px;
    border-radius: 20px;
}

.status-bar .dot {
    width: 8px;
    height: 8px;
    background: #64748b;
    border-radius: 50%;
}

.status-bar.online .dot {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 30px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

input {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px 16px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

input:focus {
    border-color: var(--primary);
}

.primary-btn, .success-btn, .danger-btn {
    border: none;
    border-radius: 12px;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

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

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

.hidden { display: none !important; }

/* User Section Styles */
.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
}

.avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
}

.user-list-container h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 15px;
}

#user-list {
    list-style: none;
}

.user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    margin-bottom: 8px;
    transition: background 0.2s;
}

.user-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.user-item .call-icon {
    background: var(--primary);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: transform 0.2s;
}

.user-item .call-icon:hover {
    transform: scale(1.1);
}

/* Call Overlay */
.active-call {
    text-align: center;
    padding: 20px 0;
}

.call-animation {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
}

.caller-avatar {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    z-index: 2;
}

.circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.5;
}

.pulse {
    animation: pulse 2s infinite;
}

.delay-1 { animation-delay: 0.5s; }
.delay-2 { animation-delay: 1s; }

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1.8); opacity: 0; }
}

.call-controls {
    margin-top: 30px;
}

.hangup-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--danger);
    font-size: 1.5rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.modal-content {
    background: var(--bg-dark);
    border: 1px solid var(--glass-border);
    padding: 40px;
    border-radius: 32px;
    text-align: center;
    width: 90%;
    max-width: 350px;
}

.avatar.large {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    font-size: 2.5rem;
}

.modal-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 30px;
}