/* ==========================================================================
   Premium SaaS Split-Screen Authentication Stylesheet - UI/UX Polish Pass
   Design Tokens: Harmonized High-Contrast Light and Dark Themes (WCAG AA)
   ========================================================================== */

/* Design Tokens */
[data-theme="light"] {
    --auth-bg-primary: #F8FAFC;
    --auth-bg-secondary: #FFFFFF;
    
    --auth-text-primary: #0F172A;
    --auth-text-secondary: #475569;
    --auth-text-muted: #64748B;
    
    --auth-border: #CBD5E1;
    --auth-border-focus: #4F7CFF;
    --auth-input-bg: #FFFFFF;
    
    --auth-card-bg: rgba(255, 255, 255, 0.85);
    --auth-card-border: rgba(15, 23, 42, 0.08);
    --auth-card-shadow: 0 25px 60px -15px rgba(15, 23, 42, 0.08);
    
    --auth-marketing-bg: #F1F5F9;
    --auth-marketing-border: rgba(15, 23, 42, 0.06);
    --auth-marketing-text: #475569;
    --auth-marketing-title: #0F172A;
    --auth-marketing-feature-bg: rgba(79, 124, 255, 0.06);
    --auth-marketing-feature-border: rgba(79, 124, 255, 0.15);
}

[data-theme="dark"] {
    --auth-bg-primary: #030712;
    --auth-bg-secondary: #020617;
    
    --auth-text-primary: #F8FAFC;
    --auth-text-secondary: #94A3B8;
    --auth-text-muted: #64748B;
    
    --auth-border: #334155;
    --auth-border-focus: #4F7CFF;
    --auth-input-bg: rgba(11, 15, 25, 0.6);
    
    --auth-card-bg: rgba(11, 15, 25, 0.75);
    --auth-card-border: rgba(255, 255, 255, 0.06);
    --auth-card-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.55);
    
    --auth-marketing-bg: #020617;
    --auth-marketing-border: rgba(255, 255, 255, 0.05);
    --auth-marketing-text: #94A3B8;
    --auth-marketing-title: #FFFFFF;
    --auth-marketing-feature-bg: rgba(79, 124, 255, 0.08);
    --auth-marketing-feature-border: rgba(79, 124, 255, 0.18);
}

/* Full Viewport Container */
.auth-container {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
    width: 100vw;
    overflow-x: hidden;
    background-color: var(--auth-bg-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    transition: background-color 0.3s ease;
}

/* Left Marketing Pane */
.auth-marketing-pane {
    flex: 1.1;
    background: var(--auth-marketing-bg);
    border-right: 1px solid var(--auth-marketing-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 4.5rem 4rem;
    position: relative;
    z-index: 10;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.auth-marketing-pane::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(79, 124, 255, 0.04) 0%, transparent 100%);
    pointer-events: none;
}

/* Brand Header */
.auth-logo {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-decoration: none;
    z-index: 20;
    transition: transform 0.2s ease;
}

.auth-logo:hover {
    transform: translateY(-1px);
}

.auth-logo-mark {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, #4f7cff, #6366f1);
    display: grid;
    place-items: center;
    color: #ffffff;
    font-weight: 900;
    font-size: 1.25rem;
    font-family: 'Outfit', sans-serif;
    box-shadow: 0 10px 25px rgba(79, 124, 255, 0.35);
}

.auth-logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--auth-text-primary);
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

/* Marketing Copy */
.auth-marketing-content {
    max-width: 480px;
    z-index: 20;
    margin-top: auto;
    margin-bottom: auto;
}

.auth-marketing-content h2 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2rem, 3.5vw, 2.75rem);
    font-weight: 800;
    color: var(--auth-marketing-title);
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.auth-marketing-content h2 span {
    background: linear-gradient(120deg, #4f7cff 30%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-marketing-content p {
    font-size: 1.05rem;
    color: var(--auth-marketing-text);
    line-height: 1.65;
    margin-bottom: 2.5rem;
    transition: color 0.3s ease;
}

/* Features List */
.auth-features-list {
    display: grid;
    gap: 1.5rem;
    margin-top: 1rem;
}

.auth-feature-item {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.auth-feature-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--auth-marketing-feature-bg);
    border: 1px solid var(--auth-marketing-feature-border);
    display: grid;
    place-items: center;
    color: #4f7cff;
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.auth-feature-item:hover .auth-feature-icon {
    transform: scale(1.05);
    box-shadow: 0 0 12px rgba(79, 124, 255, 0.2);
}

.auth-feature-text h4 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    color: var(--auth-marketing-title);
}

.auth-feature-text p {
    font-size: 0.88rem;
    color: var(--auth-text-secondary);
    margin: 0;
    line-height: 1.5;
}

.auth-marketing-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--auth-text-muted);
    z-index: 20;
    border-top: 1px solid var(--auth-marketing-border);
    padding-top: 1.75rem;
    transition: color 0.3s ease, border-color 0.3s ease;
}

/* Right Form Column */
.auth-form-pane {
    flex: 0.9;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    background: var(--auth-bg-primary);
    position: relative;
    overflow-y: auto;
    transition: background 0.3s ease;
}

.auth-form-pane::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(79, 124, 255, 0.04) 0%, transparent 70%);
    filter: blur(60px);
    pointer-events: none;
    z-index: 1;
}

/* Glassmorphic Form Card */
.auth-card {
    max-width: 460px;
    width: 100%;
    padding: 3rem 2.5rem;
    border-radius: 20px;
    background: var(--auth-card-bg);
    border: 1px solid var(--auth-card-border);
    box-shadow: var(--auth-card-shadow);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
    z-index: 10;
    animation: authCardEntrance 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

@keyframes authCardEntrance {
    from {
        opacity: 0;
        transform: translateY(15px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Precise Form Spacing Requirements */
.auth-card-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px; /* Spacing Spec: Title -> Subtitle 16px */
    color: var(--auth-text-primary);
    text-align: center;
    transition: color 0.3s ease;
}

.auth-card-header p {
    font-size: 0.94rem;
    color: var(--auth-text-secondary);
    margin-bottom: 32px; /* Spacing Spec: Subtitle -> Input/Form elements 32px */
    text-align: center;
    transition: color 0.3s ease;
}

/* Form Group Layout & Input heights */
.auth-container .form-group {
    margin-bottom: 20px; /* Spacing Spec: Input -> Input 20px */
    display: flex;
    flex-direction: column;
    position: relative;
}

.auth-container .form-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--auth-text-primary);
    margin-bottom: 8px; /* Spacing Spec: Label -> Input 8px */
    transition: color 0.3s ease;
}

/* Consistent Input Styling */
.auth-container .form-control {
    height: 56px !important; /* Height Spec: 56px */
    border-radius: 14px !important; /* Border Radius Spec: 14px */
    font-size: 0.95rem !important;
    font-weight: 500 !important;
    background-color: var(--auth-input-bg) !important;
    color: var(--auth-text-primary) !important;
    border: 1px solid var(--auth-border) !important;
    padding-left: 48px !important; /* Left Padding Spec: 48px+ spacing */
    padding-right: 48px !important; /* Right Padding to clear eye icon toggle */
    padding-top: 15px !important;
    padding-bottom: 15px !important;
    line-height: 24px !important;
    outline: none !important;
    box-shadow: none !important;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease !important;
}

.auth-container .form-control::placeholder {
    color: var(--auth-text-muted) !important;
    font-weight: 400 !important;
    opacity: 1 !important;
}

/* Input Focus States */
.auth-container .form-control:focus {
    border-color: var(--auth-border-focus) !important; /* Focus Border Spec: #4F7CFF */
    box-shadow: 0 0 0 4px rgba(79, 124, 255, 0.25) !important; /* Focus Glow Spec: rgba(79,124,255,.25) */
    background-color: var(--auth-bg-secondary) !important;
}

/* Input Icon Grouping & Exact Vertically Centered Alignments */
.auth-container .input-icon-group {
    position: relative;
    width: 100%;
}

.auth-container .input-icon-group i:not(.fa-eye):not(.fa-eye-slash) {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px; /* Width Spec: 20px icon width */
    text-align: center;
    font-size: 1.1rem;
    color: var(--auth-text-secondary);
    pointer-events: none;
    z-index: 10;
    transition: color 0.2s ease;
}

.auth-container .input-icon-group:focus-within i:not(.fa-eye):not(.fa-eye-slash) {
    color: var(--auth-border-focus);
}

/* Clickable Password visibility eye icon */
.auth-container .password-toggle-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px; /* Bounding Box Spec: minimum 40x40 area */
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--auth-text-secondary);
    cursor: pointer;
    border-radius: 50%;
    z-index: 10;
    padding: 0;
    transition: all 0.2s ease;
}

.auth-container .password-toggle-btn:hover {
    background-color: rgba(79, 124, 255, 0.1);
    color: var(--auth-border-focus);
}

.auth-container .password-toggle-btn i {
    font-size: 1.05rem;
    pointer-events: none;
    transition: transform 0.2s ease;
}

.auth-container .password-toggle-btn:hover i {
    transform: scale(1.08);
}

/* Custom Role Selectors inside Register.php */
.auth-role-selector {
    display: flex;
    background: var(--auth-input-bg);
    border-radius: 12px;
    padding: 0.25rem;
    border: 1px solid var(--auth-border);
    margin-bottom: 20px;
    position: relative;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.auth-role-tab {
    flex: 1;
    text-align: center;
    padding: 0.65rem 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--auth-text-secondary);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.auth-role-tab.active {
    background: var(--auth-border-focus);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(79, 124, 255, 0.3);
}

.auth-role-tab:not(.active):hover {
    color: var(--auth-text-primary);
    background: rgba(79, 124, 255, 0.08);
}

/* Clean Form Checkbox Spec */
.auth-container .form-group.form-check {
    margin-top: 4px !important;
    margin-bottom: 24px !important; /* Spacing Spec: Checkbox -> Button 24px */
    padding-left: 0 !important;
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 12px !important;
    white-space: nowrap !important;
}

.auth-container .form-check-input {
    background-color: var(--auth-input-bg) !important;
    border: 1.5px solid var(--auth-border) !important;
    width: 18px !important;
    height: 18px !important;
    border-radius: 5px !important;
    cursor: pointer !important;
    margin: 0 !important;
    float: none !important;
    flex-shrink: 0 !important;
    outline: none !important;
    box-shadow: none !important;
    transition: all 0.2s ease;
}

.auth-container .form-check-input:checked {
    background-color: var(--auth-border-focus) !important;
    border-color: var(--auth-border-focus) !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/%3e%3c/svg%3e") !important;
}

.auth-container .form-check-input:focus {
    border-color: var(--auth-border-focus) !important;
    box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.2) !important;
}

.auth-container .form-check-label {
    font-size: 0.9rem !important;
    font-weight: 500 !important;
    color: var(--auth-text-secondary) !important;
    cursor: pointer !important;
    user-select: none !important;
    line-height: 1 !important;
    margin: 0 !important;
    padding: 0 !important;
    display: inline-block !important;
    transition: color 0.3s ease;
}

/* Premium Action Buttons */
.auth-container .primary-btn {
    height: 56px !important;
    border-radius: 14px !important;
    background: linear-gradient(135deg, #4f7cff, #6366f1) !important;
    color: #ffffff !important;
    font-size: 1rem !important;
    font-weight: 700 !important;
    border: none !important;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(79, 124, 255, 0.22) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container .primary-btn:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 12px 30px rgba(79, 124, 255, 0.38) !important;
    background: linear-gradient(135deg, #3c6be6, #5356e6) !important;
}

.auth-container .primary-btn:active {
    transform: translateY(0) !important;
}

/* Accessibility Secondary helper links and texts */
.auth-container .text-muted {
    color: var(--auth-text-secondary) !important;
    transition: color 0.3s ease;
}

.auth-container .form-hint {
    color: var(--auth-text-muted) !important;
    font-size: 0.8rem;
    margin-top: 6px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.auth-action-link {
    font-size: 0.88rem;
    color: var(--auth-border-focus) !important;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease;
}

.auth-action-link:hover {
    color: #3c6be6 !important;
    text-decoration: underline;
}

/* Inline alerts contrast fix */
.auth-container .alert {
    border-radius: 12px;
    padding: 1rem 1.25rem;
    font-size: 0.88rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
}

.auth-container .alert.success {
    background-color: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.25);
    color: #10b981;
}

.auth-container .alert.error {
    background-color: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.25);
    color: #ef4444;
}

/* Theme Toggle placement (Visually connected directly inside the card) */
.auth-container .auth-toggle-theme {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--auth-input-bg);
    border: 1px solid var(--auth-border);
    color: var(--auth-text-primary);
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.auth-container .auth-toggle-theme:hover {
    background: var(--auth-border-focus);
    color: #ffffff;
    border-color: var(--auth-border-focus);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(79, 124, 255, 0.25);
}

.auth-container .auth-toggle-theme i {
    font-size: 1.05rem;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-container .auth-toggle-theme:hover i {
    transform: rotate(180deg);
}

/* ==========================================================================
   Responsive Grid Splitting Rules
   ========================================================================== */

/* 1. Desktop widescreen spacing limits */
@media (min-width: 1400px) {
    .auth-marketing-pane {
        padding: 5rem 6rem;
    }
    
    .auth-form-pane {
        padding: 4rem;
    }
}

/* 2. Tablet split-screen 60/40 grid layout */
@media (max-width: 992px) and (min-width: 768px) {
    .auth-container {
        flex-direction: row !important;
    }
    
    .auth-marketing-pane {
        flex: 0.6 !important;
        display: flex !important;
        padding: 3rem 2.25rem !important;
    }
    
    .auth-form-pane {
        flex: 0.4 !important;
        padding: 2rem 1.5rem !important;
    }
    
    .auth-card {
        padding: 2.5rem 1.75rem !important;
        border-radius: 16px !important;
    }
    
    .auth-marketing-content h2 {
        font-size: 2.2rem !important;
        margin-bottom: 1.25rem !important;
    }
    
    .auth-marketing-content p {
        font-size: 0.95rem !important;
        margin-bottom: 2rem !important;
    }
    
    .auth-features-list {
        gap: 1.25rem !important;
    }
    
    .auth-feature-item {
        gap: 1rem !important;
    }
    
    .auth-feature-icon {
        width: 38px !important;
        height: 38px !important;
        font-size: 1rem !important;
    }
    
    .auth-marketing-footer {
        padding-top: 1.25rem !important;
    }
}
.auth-mobile-header {
    display: none !important;
}

/* 3. Mobile stacked layout (Marketing hidden, Card takes full width, centered) */
@media (max-width: 767px) {
    .auth-container {
        flex-direction: column !important;
        overflow-y: auto !important;
        min-height: 100vh;
        background-color: var(--auth-bg-primary);
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
    
    .auth-marketing-pane {
        display: none !important;
    }
    
    .auth-form-pane {
        flex: 1 !important;
        width: 100% !important;
        padding: 2rem 1.25rem 2rem 1.25rem !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        background: transparent !important;
    }
    
    .auth-mobile-header {
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        margin-bottom: 1.5rem !important;
        width: 100% !important;
        z-index: 20;
    }
    
    .auth-mobile-header .auth-logo {
        display: flex !important;
        align-items: center !important;
        gap: 0.85rem !important;
        text-decoration: none !important;
    }
    
    .auth-card {
        padding: 2rem 1.5rem !important;
        border-radius: 16px !important;
        width: 100% !important;
        max-width: 440px !important;
        margin: 0 auto !important;
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
    }
    
    .auth-logo {
        justify-content: center !important;
    }
}

/* ==========================================================================
   Strict CSP CSS Classes Overrides (Replacing Inline Styles)
   ========================================================================== */

.auth-container .auth-footer-text {
    font-size: 0.9rem !important;
}

.auth-container .auth-subheading-text {
    font-size: 0.85rem !important;
    font-weight: 500 !important;
}

.auth-container .auth-subheading-role {
    font-weight: 700 !important;
    color: var(--auth-text-primary) !important;
}

.auth-container .form-check-label-remember {
    font-weight: 500 !important;
}

.auth-container .admin-logo-mark {
    background: linear-gradient(135deg, #ef4444, #8b5cf6) !important;
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.4) !important;
}

.auth-container .admin-btn-primary {
    background: linear-gradient(135deg, #ef4444, #8b5cf6) !important;
    border: none !important;
    box-shadow: 0 8px 20px -4px rgba(239, 68, 68, 0.35) !important;
}

.auth-container .admin-marketing-pane {
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(239, 68, 68, 0.12) 0px, transparent 50%), 
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.1) 0px, transparent 50%), 
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.08) 0px, transparent 60%) !important;
}

.auth-container .admin-feature-icon {
    color: #ef4444 !important; 
    background: rgba(239, 68, 68, 0.08) !important; 
    border-color: rgba(239, 68, 68, 0.18) !important;
}