:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --bg-primary: #0a0c10;
    --bg-secondary: #0f1219;
    --surface: #151921;
    --surface-alpha: rgba(21, 25, 33, 0.85);
    --text-primary: #e0e0e0;
    --text-secondary: #8a8a9a;
    --text-muted: #5a5a6a;
    --border-color: rgba(255, 255, 255, 0.06);
    --input-bg: #0d1117;
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus-border: var(--primary-color);
    --input-focus-glow: rgba(37, 99, 235, 0.25);
    --error-color: #e74c3c;
    --error-bg: rgba(231, 76, 60, 0.08);
    --error-border: rgba(231, 76, 60, 0.25);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition);
}

    a:hover {
        color: var(--secondary-color);
    }

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

    .form-group label {
        display: block;
        margin-bottom: 8px;
        color: var(--text-secondary);
        font-weight: 500;
        font-size: 13px;
        letter-spacing: 0.3px;
        text-transform: uppercase;
    }

    .form-group .input-wrapper {
        position: relative;
    }

    .form-group .input-icon {
        position: absolute;
        left: 14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-muted);
        font-size: 16px;
        pointer-events: none;
        transition: color var(--transition);
    }

    .form-group input {
        width: 100%;
        padding: 14px 14px 14px 44px;
        background: var(--input-bg);
        border: 1px solid var(--input-border);
        border-radius: var(--radius-md);
        font-size: 15px;
        color: var(--text-primary);
        outline: none;
        transition: border-color var(--transition), box-shadow var(--transition);
        font-family: inherit;
    }

        .form-group input::placeholder {
            color: var(--text-muted);
        }

        .form-group input:focus {
            border-color: var(--input-focus-border);
            box-shadow: 0 0 0 3px var(--input-focus-glow);
        }

            .form-group input:focus ~ .input-icon {
                color: var(--primary-color);
            }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    margin-bottom: 12px;
    letter-spacing: 0.3px;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #ffffff !important;
}

    .btn-primary:hover:not(:disabled) {
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(37, 99, 235, 0.35);
    }

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

    .btn-outline:hover:not(:disabled) {
        background: rgba(37, 99, 235, 0.1);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.15);
    }

.card {
    background: var(--surface-alpha);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.error-box {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin: 20px 0;
}

    .error-box p {
        font-size: 14px;
        color: var(--error-color);
        line-height: 1.5;
    }