/**
 * LMS Login Page Styles
 * Modern Bootstrap 5.3 Login with SIS Integration Support
 */

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

html, body.login-page {
    height: 100%;
    overflow: hidden;
}

body.login-page {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f4f6f9;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-wrapper {
    width: 100%;
    max-width: 1000px;
    max-height: calc(100vh - 40px);
    display: flex;
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out;
}

/* Left Panel - Branding */
.login-brand-panel {
    flex: 1;
    background: linear-gradient(135deg, var(--lms-dark) 0%, color-mix(in srgb, var(--lms-dark), #16213e 30%) 100%);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.login-brand-panel::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-5%, -5%); }
}

.brand-content {
    position: relative;
    z-index: 1;
}

.login-logo {
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.login-logo i {
    font-size: 2.5rem;
}

.login-logo img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.login-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.login-subtitle {
    opacity: 0.85;
    font-size: 1rem;
    max-width: 320px;
    margin: 0 auto;
    line-height: 1.6;
}

.mode-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255,255,255,0.15);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.8rem;
    margin-top: 2rem;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

/* Right Panel - Form */
.login-form-panel {
    flex: 1;
    padding: 2.5rem 3rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto;
    max-height: 100%;
}

.form-header {
    margin-bottom: 1.5rem;
    flex-shrink: 0;
}

.form-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 0.5rem;
}

.form-header p {
    color: #6c757d;
    font-size: 0.95rem;
}

.login-form-panel .form-floating {
    margin-bottom: 0.75rem;
}

.login-form-panel .form-floating > .form-control {
    border-radius: 12px;
    border: 2px solid #e9ecef;
    padding: 1.25rem 0.75rem 0.5rem;
    height: calc(3rem + 4px);
    font-size: 0.9rem;
}

.login-form-panel .form-floating > .form-control::placeholder {
    color: transparent;
}

.login-form-panel .form-floating > .form-control:focus {
    border-color: var(--lms-primary);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
}

.login-form-panel .form-floating > label {
    padding: 1rem 0.75rem;
    color: #6c757d;
    transition: all 0.2s ease;
}

/* Floating label - move up when input has focus or value */
.login-form-panel .form-floating > .form-control:focus ~ label,
.login-form-panel .form-floating > .form-control:not(:placeholder-shown) ~ label {
    transform: scale(0.85) translateY(-0.75rem) translateX(0.15rem);
    background: #fff;
    padding: 0 0.5rem;
    height: auto;
    opacity: 1;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    z-index: 10;
}

.password-toggle:hover {
    color: var(--lms-primary);
}

.btn-login {
    width: 100%;
    padding: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--lms-primary) 0%, var(--lms-secondary) 100%);
    border: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.4);
}

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

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

.divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: #6c757d;
    font-size: 0.85rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #dee2e6;
}

.divider span {
    padding: 0 1rem;
}

.login-form-panel .alert {
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.login-form-panel .alert i {
    font-size: 1.25rem;
}

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.remember-forgot a {
    color: var(--lms-primary);
    text-decoration: none;
    font-weight: 500;
}

.remember-forgot a:hover {
    text-decoration: underline;
}

.login-form-panel .form-check-input:checked {
    background-color: var(--lms-primary);
    border-color: var(--lms-primary);
}

/* Login Tabs */
.login-tabs {
    display: flex;
    background: #f8f9fa;
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 1rem;
}

.login-tab {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    color: #6c757d;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.login-tab:hover {
    color: var(--lms-primary);
}

.login-tab.active {
    background: #fff;
    color: var(--lms-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.login-tab i {
    font-size: 1.1rem;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Student ID validation states */
.login-form-panel .form-control.is-valid {
    border-color: #198754 !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.login-form-panel .form-control.is-invalid {
    border-color: #dc3545 !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

/* Extra margin for format hint */
#studentTab .form-floating.mb-3 {
    margin-bottom: 1.75rem !important;
}

.form-footer {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
    text-align: center;
}

.form-footer a {
    color: var(--lms-primary);
    text-decoration: none;
    font-weight: 500;
}

.form-footer a:hover {
    text-decoration: underline;
}

.powered-by {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
    font-size: 0.8rem;
    color: #9ca3af;
}

.powered-by a {
    color: var(--lms-primary);
    text-decoration: none;
    font-weight: 500;
}

.powered-by a:hover {
    text-decoration: underline;
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    html, body.login-page {
        height: auto;
        overflow: auto;
    }
    
    body.login-page {
        padding: 0;
        background: linear-gradient(135deg, var(--lms-dark) 0%, color-mix(in srgb, var(--lms-dark), #16213e 30%) 100%);
    }
    
    .login-wrapper {
        flex-direction: column;
        max-width: 100%;
        max-height: none;
        min-height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }
    
    .login-brand-panel {
        padding: 2rem 1.5rem;
        min-height: 0;
        flex: none;
    }
    
    .login-brand-panel::before {
        display: none;
    }
    
    .login-logo {
        width: 70px;
        height: 70px;
        margin-bottom: 1rem;
    }
    
    .login-logo i {
        font-size: 1.75rem;
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .login-subtitle {
        font-size: 0.9rem;
    }
    
    .mode-badge {
        margin-top: 1rem;
    }
    
    .login-form-panel {
        padding: 2rem 1.5rem;
        border-radius: 24px 24px 0 0;
        margin-top: -20px;
        background: #fff;
        flex: 1;
        overflow: visible;
    }
    
    .form-header h2 {
        font-size: 1.35rem;
    }
    
    .powered-by {
        margin-top: 1.5rem;
        padding-top: 1rem;
    }
}

/* =====================================================
   DARK MODE — LOGIN PAGE
   ===================================================== */

[data-bs-theme="dark"] body.login-page {
    background-color: #0f0f23;
}

[data-bs-theme="dark"] .login-wrapper {
    background: #16213e;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}

[data-bs-theme="dark"] .login-form-panel {
    background: #16213e;
    color: #e4e6eb;
}

[data-bs-theme="dark"] .form-header h2 {
    color: #e4e6eb;
}

[data-bs-theme="dark"] .form-header p {
    color: #a0a3a8;
}

[data-bs-theme="dark"] .login-form-panel .form-floating > .form-control {
    background-color: #2d3a4f;
    border-color: #3d4a5f;
    color: #e4e6eb;
}

[data-bs-theme="dark"] .login-form-panel .form-floating > .form-control:focus {
    border-color: var(--lms-primary);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.2);
}

[data-bs-theme="dark"] .login-form-panel .form-floating > label {
    color: #a0a3a8;
}

[data-bs-theme="dark"] .login-form-panel .form-floating > .form-control:focus ~ label,
[data-bs-theme="dark"] .login-form-panel .form-floating > .form-control:not(:placeholder-shown) ~ label {
    background: #16213e;
    color: #a0a3a8;
}

[data-bs-theme="dark"] .login-tabs {
    background: #1a1a2e;
}

[data-bs-theme="dark"] .login-tab {
    color: #a0a3a8;
}

[data-bs-theme="dark"] .login-tab.active {
    background: #2d3a4f;
    color: var(--lms-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-bs-theme="dark"] .remember-forgot a {
    color: #7b8cff;
}

[data-bs-theme="dark"] .divider {
    color: #6c757d;
}

[data-bs-theme="dark"] .divider::before,
[data-bs-theme="dark"] .divider::after {
    background: #3d4a5f;
}

[data-bs-theme="dark"] .form-footer {
    border-top-color: #2d3a4f;
}

[data-bs-theme="dark"] .form-footer a {
    color: #7b8cff;
}

[data-bs-theme="dark"] .powered-by {
    border-top-color: #2d3a4f;
    color: #6c757d;
}

[data-bs-theme="dark"] .powered-by a {
    color: #7b8cff;
}

[data-bs-theme="dark"] .password-toggle {
    color: #a0a3a8;
}

[data-bs-theme="dark"] .form-check-label {
    color: #c8ccd0;
}

@media (max-width: 768px) {
    [data-bs-theme="dark"] body.login-page {
        background: linear-gradient(135deg, var(--lms-dark) 0%, color-mix(in srgb, var(--lms-dark), #16213e 30%) 100%);
    }

    [data-bs-theme="dark"] .login-form-panel {
        background: #16213e;
    }
}

/* =====================================================
   BLACK (OLED) MODE — LOGIN PAGE
   ===================================================== */

[data-bs-theme="black"] body.login-page {
    background-color: #000000;
}

[data-bs-theme="black"] .login-wrapper {
    background: #0a0a0a;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

[data-bs-theme="black"] .login-form-panel {
    background: #0a0a0a;
    color: #e4e6eb;
}

[data-bs-theme="black"] .form-header h2 {
    color: #fff;
}

[data-bs-theme="black"] .form-header p {
    color: #a0a3a8;
}

[data-bs-theme="black"] .login-form-panel .form-floating > .form-control {
    background-color: #1a1a1a;
    border-color: #2a2a2a;
    color: #e4e6eb;
}

[data-bs-theme="black"] .login-form-panel .form-floating > .form-control:focus {
    border-color: var(--lms-primary);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.2);
}

[data-bs-theme="black"] .login-form-panel .form-floating > label {
    color: #a0a3a8;
}

[data-bs-theme="black"] .login-form-panel .form-floating > .form-control:focus ~ label,
[data-bs-theme="black"] .login-form-panel .form-floating > .form-control:not(:placeholder-shown) ~ label {
    background: #0a0a0a;
    color: #a0a3a8;
}

[data-bs-theme="black"] .login-tabs {
    background: #000000;
}

[data-bs-theme="black"] .login-tab {
    color: #a0a3a8;
}

[data-bs-theme="black"] .login-tab.active {
    background: #1a1a1a;
    color: var(--lms-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="black"] .remember-forgot a {
    color: #6ea8fe;
}

[data-bs-theme="black"] .divider {
    color: #6c757d;
}

[data-bs-theme="black"] .divider::before,
[data-bs-theme="black"] .divider::after {
    background: #2a2a2a;
}

[data-bs-theme="black"] .form-footer {
    border-top-color: #1a1a1a;
    color: #a0a3a8;
}

[data-bs-theme="black"] .form-footer a {
    color: #6ea8fe;
}

[data-bs-theme="black"] .powered-by {
    border-top-color: #1a1a1a;
    color: #6c757d;
}

[data-bs-theme="black"] .powered-by a {
    color: #6ea8fe;
}

[data-bs-theme="black"] .password-toggle {
    color: #a0a3a8;
}

[data-bs-theme="black"] .form-check-label {
    color: #c8ccd0;
}

@media (max-width: 768px) {
    [data-bs-theme="black"] body.login-page {
        background: #000000;
    }

    [data-bs-theme="black"] .login-form-panel {
        background: #0a0a0a;
    }
}