:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --danger-color: #dc3545;
    --background-color: #f4f7f6;
    --card-background: #ffffff;
    --text-color: #333;
    --text-muted: #6c757d;
    --border-color: #ddd;
    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);

    --header-height: 56px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    
    padding-top: var(--header-height);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
header a:hover {
    text-decoration: none;
}

.fixed-top {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1030;
}
.container {
    width: 100%;
    padding-right: 1rem;
    padding-left: 1rem;
    margin-right: auto;
    margin-left: auto;
}
@media (min-width: 992px) {
    .container { max-width: 960px; }
}
.d-flex { display: flex !important; }
.justify-content-between { justify-content: space-between !important; }
.align-items-center { align-items: center !important; }
.flex-row { flex-direction: row !important; }

.navbar {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    min-height: var(--header-height); 
    box-sizing: border-box;
    display: flex;
    align-items: center;
}
.navbar > .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}
.navbar-brand {
    font-size: 1.25rem;
    text-decoration: none;
    white-space: nowrap;
}
.fw-bold { font-weight: 700 !important; }
.navbar-nav {
    display: flex;
    padding-left: 0;
    margin-bottom: 0;
    list-style: none;
}
.nav-link {
    display: block;
    padding: 0.5rem;
    text-decoration: none;
}
.ms-2 { margin-left: 0.5rem !important; }
.ms-lg-2 { margin-left: 0.5rem !important; }
.bg-dark { background-color: #212529 !important; }
.navbar-dark .navbar-brand { color: #fff; }
.navbar-dark .navbar-brand:hover { color: #fff; }
.navbar-dark .nav-link { color: rgba(255, 255, 255, 0.55); }
.navbar-dark .nav-link:hover { color: rgba(255, 255, 255, 0.75); }
.hidden { display: none !important; }

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    
    min-height: calc(100vh - var(--header-height));
}

body.no-header {
    padding-top: 0;
}
body.no-header .login-page {
    min-height: 100vh;
}

.login-container {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 95%;
    max-width: 450px;
}
.login-header {
    text-align: center;
    margin-bottom: 1.5rem;
}
.login-header h2 { margin-bottom: 0.5rem; color: var(--text-color); }
.login-header p { color: var(--text-muted); font-size: 0.9rem; }

.login-form .input-group {
    margin-bottom: 1.25rem;
    position: relative;
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}
.input-group input[type="email"],
.input-group input[type="password"],
.input-group input[type="text"],
.input-group input[type="tel"] {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color 0.2s, box-shadow 0.2s;
    
    padding-right: 2.75rem; 
}
.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

.input-icon {
    position: absolute;
    right: 1rem;
    top: 2.85rem;
    color: var(--text-muted);
    font-size: 1rem;
    transition: color 0.2s;
}
.toggle-password-icon {
    cursor: pointer;
}
.input-group input:focus + .input-icon {
    color: var(--primary-color);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}
.checkbox-group {
    display: flex;
    align-items: center;
}
.checkbox-group input[type="checkbox"] {
    margin-right: 0.5rem;
}
.btn-submit {
    width: 100%;
    padding: 0.85rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: var(--card-background);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}
.btn-submit:hover {
    background-color: var(--primary-hover);
}
.btn-submit:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
}
.signup-link {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    height: 1em;
}
.input-group input.invalid {
    border-color: var(--danger-color);
}
.input-group input.invalid + .input-icon {
    color: var(--danger-color);
}

.error-message-global {
    color: var(--danger-color);
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.2);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-align: center;
}
.error-message-global.hidden {
    display: none;
}

.signout-page-content {
    text-align: center;
    padding: 1rem 0;
}
.signout-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: inline-block;
}
.signout-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}
.signout-button-grid {
    margin-top: 2rem;
}
.signout-button-grid .btn-submit {
    display: block;
    text-align: center;
    text-decoration: none;
}