* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #0f172a;
    color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

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

header {
    text-align: center;
    margin-bottom: 24px;
}

.logo {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    margin-bottom: 10px;
}

h1 {
    font-size: 1.8rem;
    color: #38bdf8;
}

.card {
    background-color: #1e293b;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.hidden {
    display: none;
}

.input-group {
    display: flex;
    gap: 8px;
    margin: 16px 0;
}

input, select {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #334155;
    background-color: #0f172a;
    color: #fff;
    font-size: 0.95rem;
}

input { flex: 1; }
select { width: 45%; }

button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
}

.btn-primary {
    background-color: #6366f1;
    color: #fff;
}
.btn-primary:hover { background-color: #4f46e5; }

.btn-secondary {
    background-color: #334155;
    color: #fff;
}
.btn-secondary:hover { background-color: #475569; }

.email-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #0f172a;
    padding: 12px;
    border-radius: 8px;
    margin: 12px 0 20px 0;
}

.email-display button {
    width: auto;
    padding: 6px 16px;
}

.inbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.inbox-header button {
    width: auto;
    padding: 6px 12px;
}

.messages-container {
    background-color: #0f172a;
    border-radius: 8px;
    padding: 12px;
    min-height: 150px;
    max-height: 300px;
    overflow-y: auto;
}

.empty-text {
    text-align: center;
    color: #64748b;
    margin-top: 50px;
}

.message-item {
    background-color: #1e293b;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 8px;
    border-left: 4px solid #6366f1;
}

.msg-from, .msg-subject {
    font-size: 0.85rem;
    color: #94a3b8;
    margin-bottom: 4px;
}

.msg-body {
    font-size: 0.95rem;
    color: #e2e8f0;
    margin-top: 8px;
    white-space: pre-wrap;
    }