:root {
    --primary-indigo: #5b7cfe;
    --dark-indigo: #8b5cf6;
    --sv-bg: #0b1220;
    --glass-bg: rgba(15, 23, 42, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--sv-bg);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: #f8fafc;
    overflow-x: hidden;
}

/* Split Layout Container */
.auth-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

/* Left Banner Section */
.auth-banner {
    flex: 1.2;
    background: radial-gradient(1200px 900px at 10% 0%, rgba(91, 124, 254, 0.25), transparent 70%),
                radial-gradient(900px 700px at 85% 10%, rgba(139, 92, 246, 0.20), transparent 60%),
                var(--sv-bg);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    overflow: hidden;
}

.auth-banner::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 86c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm66-3c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm-40-39c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm29 45c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM32 13c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm54 54c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM16 8c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm56 12c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm-54 44c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm56 2c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM33 35c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm35 4c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM24 24c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm44 56c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM44 20c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm0 56c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm26-57c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm0 74c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM13 54c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm74 0c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM54 13c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm0 74c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM7 33c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm74 35c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM3 50c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm74 44c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM44 88c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm54-44c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%235b7cfe' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    z-index: 1;
}

/* Right Form Section */
.auth-form-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: radial-gradient(circle at 100% 100%, rgba(91, 124, 254, 0.05), transparent 50%), var(--sv-bg);
}

.login-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 2rem;
    padding: 3rem;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.5);
    animation: cardIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 10;
}

/* Responsive Overrides */
@media (max-width: 991px) {
    .auth-banner {
        display: none;
    }
    .auth-form-section {
        flex: 1;
        padding: 1.5rem;
    }
}

.logo-container {
    width: 100px;
    height: 100px;
    background: #fff;
    border-radius: 1.5rem;
    margin: 0 auto 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
    transform: rotate(0deg);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo-container:hover {
    transform: rotate(-3deg) scale(1.05);
}

.logo-container img {
    width: 64px;
    height: auto;
}

.form-label {
    color: #94a3b8;
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.6rem;
    margin-left: 0.25rem;
}

.form-control-sv {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 1.15rem;
    padding: 1rem 1.25rem;
    color: #fff;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.form-control-sv:focus {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-indigo);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    color: #fff;
    outline: none;
}

.btn-sv {
    background: linear-gradient(135deg, var(--primary-indigo) 0%, var(--dark-indigo) 100%);
    border: none;
    border-radius: 1.15rem;
    padding: 1.1rem;
    font-weight: 700;
    color: #fff;
    width: 100%;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.25);
    letter-spacing: 0.02em;
}

.btn-sv:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.45);
}

.btn-sv:active {
    transform: translateY(-1px);
}

.sv-link {
    color: #94a3b8;
    font-size: 0.85rem;
    transition: color 0.2s ease;
    text-decoration: none;
}

.sv-link:hover {
    color: var(--primary-indigo);
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(40px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.alert-sv {
    border: 0;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: 1rem;
    border-radius: 1.25rem;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}