body {
    background: #eef2f3;
    font-family: Arial, sans-serif;
}

.login-container, .dashboard-container {
    width: 350px;
    margin: 120px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
}

h2 {
    margin-bottom: 20px;
    color: #333;
}

input, select {
    width: 90%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    outline: none;
}

input:focus, select:focus {
    border-color: #4a90e2;
}

button {
    width: 95%;
    padding: 12px;
    background: #4a90e2;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    font-size: 15px;
}

button:hover {
    background: #357ab8;
}

.start-btn {
    margin-top: 10px;
}

.error {
    color: red;
    margin-bottom: 10px;
}

#loadingOverlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.45);
    z-index: 9999;

    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.loader {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 65px;
    height: 65px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.panel-wrapper {
    display: flex;
    min-height: 100vh;
    background: #f0f2f5;
}

/* SOL RAPOR PANELİ */
.rapor-listesi {
    width: 280px;
    background: #1f2937;
    color: #fff;
    padding: 20px;
}

.rapor-listesi h3 {
    margin-bottom: 15px;
    font-size: 18px;
    border-bottom: 1px solid #374151;
    padding-bottom: 8px;
}

.rapor-listesi ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.rapor-listesi li {
    margin-bottom: 10px;
}

.rapor-listesi a {
    display: block;
    padding: 10px;
    background: #374151;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.2s;
}

.rapor-listesi a:hover {
    background: #4b5563;
}

.rapor-tarih {
    font-size: 12px;
    color: #cbd5e1;
}

.rapor-listesi .bos {
    font-size: 13px;
    color: #9ca3af;
}

/* SAĞ TARAF */
.dashboard-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.panel-wrapper {
    display: flex;
    height: 100vh;
    background: #f3f4f6;
}

/* SOL MENÜ */
.sidebar {
    width: 300px;
    background: #111827;
    color: #fff;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.logo img {
    max-width: 100%;
    margin-bottom: 20px;
}

.sidebar h3 {
    margin-bottom: 10px;
    border-bottom: 1px solid #374151;
    padding-bottom: 6px;
}

.sidebar select,
.sidebar button {
    width: 100%;
    margin-bottom: 10px;
    padding: 8px;
}

.rapor-list {
    list-style: none;
    padding: 0;
    flex: 1;
    overflow-y: auto;
}

.rapor-list li a {
    display: block;
    background: #1f2937;
    margin-bottom: 8px;
    padding: 10px;
    border-radius: 6px;
    color: #fff;
    text-decoration: none;
}

.rapor-list li a:hover {
    background: #374151;
}

.bos {
    color: #9ca3af;
    font-size: 13px;
}

/* BUTONLAR */
.btn {
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.filtre-btn {
    background: #2563eb;
    color: white;
}

.yeni-btn {
    background: #10b981;
    color: white;
}

/* SAĞ ALAN */
.content {
    flex: 1;
    padding: 40px;
}

.denetime-sec {
    max-width: 400px;
}

.hidden {
    display: none;
}

.logo-img {
    width: 120px;
    display: block;
    margin: 0 auto;
}

#center-logo {
    text-align: center;
    margin-bottom: 30px;
}

#center-logo img {
    width: 220px;
    opacity: 0.9;
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 0.9; transform: scale(1); }
}