/* --- 1. CORE THEME & GLOBAL STYLES --- */
        :root {
            --brand-green-dark: #1e4620;
            --brand-green-accent: #2a9d8f;
            --brand-green-mid: #81c784;
            --brand-green-light: #e8f5e9;
            --glow-color: rgba(129, 199, 132, 0.5);
            --text-primary: #1a3b1a;
            --text-secondary: #36533c;
            --bg-light: #fbfdfb;
            --animation-duration: 0.6s;
            --x: 50%; /* For interactive glow */
            --y: 50%; /* For interactive glow */
        }

        body {
            font-family: 'Manrope', sans-serif;
            background-color: var(--bg-light);
            color: var(--text-primary);
            margin: 0;
            overflow-x: hidden;
        }

        .font-playfair {
            font-family: 'Playfair Display', serif;
            letter-spacing: -0.02em;
        }

        /* --- 2. SIGN-IN PAGE LAYOUT & STRUCTURE --- */
        #signin-page-container {
            display: grid;
            grid-template-columns: 1fr; /* Mobile-first: single column */
            min-height: 100vh;
            width: 100vw;
            overflow: hidden;
        }

        @media (min-width: 1024px) {
            #signin-page-container {
                grid-template-columns: 1fr 1fr; /* Split screen on desktop */
            }
        }

        /* --- 3. LEFT PANE (VISUALS) --- */
        .signin-visual-pane {
            position: relative;
            display: none; /* Hidden on mobile */
            overflow: hidden;
        }
        
        @media (min-width: 1024px) {
            .signin-visual-pane {
                display: flex;
                flex-direction: column;
                justify-content: flex-end;
                padding: 4rem;
            }
        }

        .visual-pane-background {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            animation: ken-burns 20s infinite;
        }

        @keyframes ken-burns {
            0% { transform: scale(1.1) translate(0, 0); }
            50% { transform: scale(1.15) translate(5%, -5%); }
            100% { transform: scale(1.1) translate(0, 0); }
        }

        .visual-pane-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(30, 70, 32, 0.8) 20%, rgba(30, 70, 32, 0.2) 70%, transparent 100%);
            z-index: 1;
        }

        .visual-pane-content {
            position: relative;
            z-index: 2;
            color: #fff;
            max-width: 500px;
        }

        .visual-pane-title {
            font-family: 'Playfair Display', serif;
            font-size: 2.75rem;
            font-weight: 700;
            line-height: 1.2;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
            margin: 0 0 1rem 0;
        }

        .visual-pane-subtitle {
            font-size: 1.1rem;
            line-height: 1.7;
            color: var(--brand-green-light);
            opacity: 0.9;
        }

        /* --- 4. RIGHT PANE (FORM) --- */
        .signin-form-pane {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 4rem 2rem;
            background-color: var(--bg-light);
            background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23e8f5e9' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }

        .signin-form-card {
            width: 100%;
            max-width: 450px;
            background: rgba(251, 253, 251, 0.6);
            padding: 3.5rem;
            border-radius: 0;
            border: 1.5px solid var(--brand-green-light);
            box-shadow: 0 10px 40px -10px rgba(42, 157, 143, 0.125);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all var(--animation-duration) cubic-bezier(0.2, 0.8, 0.2, 1);
            position: relative;
            overflow: hidden;
        }

        .signin-form-card:hover {
            transform: translateY(-16px) scale(1.02);
            box-shadow: 0 25px 50px -12px rgba(42, 157, 143, 0.25);
            border-color: var(--brand-green-mid);
        }

        .signin-form-card::before {
            content: ''; position: absolute; top: var(--y, 50%); left: var(--x, 50%); transform: translate(-50%, -50%) scale(0); width: 300px; height: 300px; background-image: radial-gradient(circle, var(--glow-color) 0%, transparent 70%); border-radius: 50%; opacity: 0; transition: transform 0.8s ease, opacity 0.8s ease; z-index: 0;
        }
        
        .signin-form-card:hover::before {
            transform: translate(-50%, -50%) scale(1); opacity: 1;
        }

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

        .form-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .form-title {
            font-family: 'Playfair Display', serif;
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 0.5rem 0;
        }

        .form-subtitle {
            color: var(--text-secondary);
            font-size: 1rem;
        }

        /* Input Fields (Replicated from contact.php) */
        .form-group {
            position: relative;
            margin-bottom: 2rem;
        }
        .form-group label {
            position: absolute;
            top: 1rem;
            left: 1rem;
            color: var(--text-secondary);
            pointer-events: none;
            transition: all var(--animation-duration) ease;
            background-color: transparent; /* Changed for glassmorphism */
            padding: 0 0.25rem;
        }
        .form-group input {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--brand-green-mid);
            border-radius: 0;
            background-color: rgba(255, 255, 255, 0.5); /* Semi-transparent */
            font-family: 'Manrope', sans-serif;
            font-size: 1rem;
            transition: border-color var(--animation-duration) ease, box-shadow var(--animation-duration) ease;
            box-sizing: border-box; 
        }
        .form-group input:focus {
            outline: none;
            border-color: var(--brand-green-accent);
            box-shadow: 0 0 0 3px rgba(42, 157, 143, 0.2);
        }
        .form-group input:focus + label,
        .form-group input:not(:placeholder-shown) + label {
            top: -0.75rem;
            left: 0.75rem;
            font-size: 0.8rem;
            color: var(--brand-green-accent);
            background-color: var(--bg-light); /* Needs solid background when raised */
        }
        
        .form-helpers {
            display: flex;
            justify-content: flex-end;
            margin-top: -1rem;
            margin-bottom: 2rem;
        }

        .forgot-password-link {
            font-size: 0.9rem;
            color: var(--brand-green-accent);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }
        .forgot-password-link:hover {
            color: var(--brand-green-dark);
            text-decoration: underline;
        }

        /* Sign In Button (Replicated from .btn-primary) */
        .signin-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
            width: 100%;
            padding: 1rem 2.25rem;
            border-radius: 0;
            font-family: 'Manrope', sans-serif;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.3px;
            font-size: 1rem;
            color: #fff;
            background-image: linear-gradient(110deg, var(--brand-green-accent) 0%, var(--brand-green-mid) 100%);
            box-shadow: 0 10px 30px -5px rgba(42, 157, 143, 0.4), 0 0 15px var(--glow-color) inset;
            border: none;
            transition: all var(--animation-duration) cubic-bezier(0.2, 0.8, 0.2, 1);
            background-size: 250% auto;
            text-decoration: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            outline: none;
        }
        .signin-btn::before { /* Shimmer effect */
            content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
            background: linear-gradient(110deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
        }
        .signin-btn:hover::before, .signin-btn:focus::before { left: 100%; }
        .signin-btn:hover, .signin-btn:focus {
            background-position: right center;
            transform: translateY(-4px) scale(1.05);
            box-shadow: 0 18px 45px -8px rgba(42, 157, 143, 0.5), 0 0 20px var(--glow-color) inset;
        }

        /* --- Social Sign-In Enhancements --- */
        .social-signin-divider {
            display: flex;
            align-items: center;
            text-align: center;
            color: var(--text-secondary);
            margin: 2rem 0;
            font-size: 0.85rem;
            font-weight: 600;
        }
        .social-signin-divider::before,
        .social-signin-divider::after {
            content: '';
            flex: 1;
            border-bottom: 1px solid var(--brand-green-mid);
        }
        .social-signin-divider:not(:empty)::before {
            margin-right: .5em;
        }
        .social-signin-divider:not(:empty)::after {
            margin-left: .5em;
        }

        .social-signin-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
            width: 100%;
            padding: 0.85rem 1rem;
            border-radius: 0;
            font-family: 'Manrope', sans-serif;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            background-color: #fff;
            border: 1px solid var(--brand-green-mid);
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 1rem;
        }
        .social-signin-btn:hover {
            background-color: var(--brand-green-light);
            border-color: var(--brand-green-accent);
            color: var(--text-primary);
            box-shadow: 0 4px 15px -5px rgba(42, 157, 143, 0.3);
            transform: translateY(-2px);
        }
        .social-signin-btn svg {
            width: 20px;
            height: 20px;
        }

        .signup-prompt {
            text-align: center;
            margin-top: 2.5rem;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .signup-link {
            font-weight: 700;
            color: var(--brand-green-accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .signup-link:hover {
            color: var(--brand-green-dark);
            text-decoration: underline;
        }

        /* --- 5. ANIMATIONS & RESPONSIVE --- */
        .fade-in-up { opacity: 0; transform: translateY(40px); transition: opacity 1s cubic-bezier(.2, .8, .2, 1), transform 1s cubic-bezier(.2, .8, .2, 1); }
        .fade-in-up.visible { opacity: 1; transform: translateY(0); }

        @media (max-width: 1023px) {
            .signin-form-pane {
                padding: 4rem 1.5rem;
            }
            .signin-form-card {
                padding: 2.5rem;
            }
        }
        
        @media (prefers-reduced-motion: reduce) {
            .signin-btn, .signin-btn::before, .signin-form-card, .signin-form-card::before, .visual-pane-background, .fade-in-up {
                transition: none !important;
                animation: none !important;
            }
        }