/* ===== Apartment Check-in Manager – Frontend Styles ===== */

.acm-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 16px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* Form card */
.acm-form-card {
    background: #fff;
    border-radius: 16px;
    padding: 48px 40px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
    text-align: center;
}

.acm-title {
    margin: 0 0 8px;
    font-size: 28px;
    font-weight: 700;
    color: #1a1a2e;
}

.acm-subtitle {
    color: #6b7280;
    margin: 0 0 32px;
    font-size: 15px;
}

/* Form */
.acm-form-group {
    margin-bottom: 24px;
    text-align: left;
}

.acm-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: #374151;
}

.acm-form-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 20px;
    letter-spacing: 2px;
    text-align: center;
    transition: border-color 0.25s, box-shadow 0.25s;
    box-sizing: border-box;
    outline: none;
}

.acm-form-group input:focus {
    border-color: #4a90d9;
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

.acm-form-group input.acm-input-error {
    border-color: #e74c3c;
}

.acm-btn {
    display: inline-block;
    background: linear-gradient(135deg, #4a90d9, #357abd);
    color: #fff;
    border: none;
    padding: 14px 48px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    letter-spacing: 0.3px;
}

.acm-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(74, 144, 217, 0.35);
}

.acm-btn:active {
    transform: translateY(0);
}

.acm-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Loading */
#acm-loading {
    padding: 24px 0 8px;
    text-align: center;
}

#acm-loading p {
    margin: 12px 0 0;
    color: #6b7280;
    font-size: 14px;
}

.acm-spinner {
    display: inline-block;
    width: 36px;
    height: 36px;
    border: 4px solid #e5e7eb;
    border-top-color: #4a90d9;
    border-radius: 50%;
    animation: acm-spin 0.7s linear infinite;
}

@keyframes acm-spin {
    to { transform: rotate(360deg); }
}

/* Messages */
.acm-message {
    border-radius: 14px;
    padding: 28px 32px;
    margin: 24px 0;
    text-align: left;
    line-height: 1.6;
}

.acm-message h3 {
    margin: 0 0 14px;
    font-size: 22px;
    font-weight: 700;
}

.acm-message p {
    margin: 8px 0;
    font-size: 15px;
}

.acm-error {
    background: #fef2f2;
    border-left: 5px solid #ef4444;
    color: #991b1b;
}

.acm-warning {
    background: #fffbeb;
    border-left: 5px solid #f59e0b;
    color: #92400e;
}

.acm-warning strong {
    color: #78350f;
}

.acm-success {
    background: #ecfdf5;
    border-left: 5px solid #10b981;
    color: #065f46;
}

.acm-success strong {
    color: #064e3b;
}

.acm-expired {
    background: #f9fafb;
    border-left: 5px solid #9ca3af;
    color: #4b5563;
}

/* Content area */
#acm-content {
    background: #fff;
    border-radius: 16px;
    padding: 36px 32px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
    margin-top: 24px;
    line-height: 1.7;
}

#acm-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* Back button */
.acm-back-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 24px;
    background: #f3f4f6;
    color: #374151;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
}

.acm-back-btn:hover {
    background: #e5e7eb;
}

/* Responsive */
@media (max-width: 600px) {
    .acm-form-card {
        padding: 32px 20px;
    }

    .acm-form-group input {
        font-size: 18px;
        padding: 12px 14px;
        letter-spacing: 1px;
    }

    .acm-btn {
        width: 100%;
        padding: 14px;
    }

    .acm-message {
        padding: 20px;
    }

    .acm-message h3 {
        font-size: 18px;
    }

    #acm-content {
        padding: 24px 18px;
    }
}