:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: rgba(148, 163, 184, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Playfair Display', serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}


.back-link {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.75rem 1rem;
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--text-primary);
    background: rgba(30, 41, 59, 0.8);
    transform: translateX(-4px);
    border-color: var(--primary-light);
}

.login-container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    z-index: 10;
}


.login-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
}

.orb-1 {
    top: -10%;
    right: -10%;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}

.orb-2 {
    bottom: -10%;
    left: -10%;
    background: radial-gradient(circle, #c084fc 0%, transparent 70%);
}

.orb-3 {
    top: 40%;
    left: 40%;
    background: radial-gradient(circle, #38bdf8 0%, transparent 70%);
}


.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.login-header {
    margin-bottom: 2rem;
}

.logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.brand-text {
    text-align: center;
}

.brand-name {
    font-family: 'Playfair Display', serif;
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 0.25rem;
}

.brand-learn {
    color: var(--text-primary);
}

.brand-vault {
    color: var(--primary);
}

.tagline {
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
}


.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding-left: 0.25rem;
}

.form-input {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.875rem 1rem;
    color: var(--text-primary);
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
    color: rgba(148, 163, 184, 0.4);
}

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.875rem;
    margin-top: -0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.forgot-link {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.forgot-link:hover {
    color: white;
}

.submit-btn {
    background: var(--primary);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: 12px;
    padding: 1rem;
    color: white;
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
    margin-top: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(79, 70, 229, 0.4);
    filter: brightness(1.1);
}

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


.demo-credentials {
    margin-top: 1.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.demo-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.demo-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.demo-item {
    font-size: 0.75rem;
    background: rgba(15, 23, 42, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.demo-item:hover {
    background: rgba(15, 23, 42, 0.5);
    border-color: rgba(99, 102, 241, 0.2);
    color: #cbd5e1;
}

@media (max-width: 480px) {
    .login-card {
        padding: 2rem;
    }
}