:root {
    --bg-dark: #ffffff;
    --bg-panel: #ffffff;
    --text-main: #000000;
    --text-muted: #555555;
    --gold: #000000; 
    --gold-hover: #333333;
    --danger: #cc0000;
    --success: #008800; 
    --border-color: #dddddd;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

h1, h2, h3 {
    font-weight: 500;
    color: var(--gold);
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

input[type="text"],
input[type="password"],
input[type="email"] {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 4px;
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--gold);
}

.btn-gold {
    display: inline-block;
    width: 100%;
    padding: 0.8rem;
    background-color: var(--gold);
    color: var(--bg-dark);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.2s;
}

.btn-gold:hover {
    background-color: var(--gold-hover);
}

.login-panel {
    background-color: var(--bg-panel);
    padding: 2.5rem;
    border-radius: 8px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    border-top: 3px solid var(--gold);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.flash-msg {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
    text-align: center;
}

.flash-error {
    background-color: rgba(207, 102, 121, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.flash-success {
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.tabs-nav {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1.5rem;
    gap: 0.5rem;
}
.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.tab-btn:hover { color: var(--text-main); }
.tab-btn.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
}
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease-in-out; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.profile-header {
    display: flex;
    gap: 2rem;
    background-color: var(--bg-panel);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border-left: 4px solid var(--gold);
}
.profile-photo img {
    width: 150px; height: 150px;
    object-fit: cover; border-radius: 50%;
    border: 3px solid var(--border-color);
}
.profile-info h2 { margin-bottom: 0.5rem; }
.profile-info p { margin-bottom: 0.3rem; color: var(--text-muted); }